3 Read the article again. What do the four icons have in common?a Their appearance has changed a lot over time.b They are all icons from the 20 century.Ć They've all survived as icons for at least 50 years.​

Бл я тоже не могу найти ответы((

We use money every day to pay for things we buy.
Thousands of years ago, the money was not used. Instead, man had the “barter” system. This meant that if one wanted something he had, he had to find someone who had this thing. Then he had to offer him something in exchange. And if that person didn't like what he was offered, the first man couldn't get what he needed.
Over time, certain things were used as money, because virtually everyone would take these things in exchange. In the past people used shells, beads, beans, cocoa, salt, grain, tobacco, leather, and even cattle. But coins are much easier to use than, say, cattle. Them easy to store and carry.
They were first made from either gold or silver. They were imprinted with the brand name. Printing was showing how much each coin was worth.Later, people began to use coins made of cheaper metals. Metal just had no value, but the coins still had value on the basis of printing, imprinted on them. People have also started to use paper money. No longer mattered that the money itself had no real value. This is the kind of money we use today.
Money has many forms. For example, this can be coins, bills or electronic money. Coins is the money of small denomination. Previously, they were made of valuable metals, because the coin itself was valuable. Now they are made from cheap materials. Due to the fact that a large number of coins was not convenient to carry, came up with paper money. They are made with special characters, so you can't fake them. First, a currency of mistrust, but then people got used to it and started to use. Today electronic money has become one of the main ways of payment for goods and services. Electronic money is very convenient to pay for purchases in online stores. The first electronic money began to produce in 1994 in the United States. They have gained popularity and within a year took their payment system. Electronic money has become much more convenient. And the card was smaller than bill.

In the big shopping malls are not only shopping but also food courts where you can buy any food and drink what you want. Also, there are a variety of entertainment movie small parks. And for the convenience of visitors, many shopping centers are open until late at night in these centers have recreational areas with benches, decorations, special conditions for disabled elderly as well as in some stores for the convenience of the teller.
To Attract people to the store is Windows. 
Looking at the shop Windows - it's sometimes an interesting exercise, but I don't think so. For me, the people who consider showcases look strange and absurd. When I look at the showcases I feel like a beggar who can't log in to the store and buy it.
Consultants often also bring inconvenience. I wish the consultant was perfect. 
The ideal consultant should not be Intrusive. If you want to ask him, then you do it yourself. A good consultant should not be rude or humiliate customers. And the buyer in turn must abide by the rules and respect the employees of the store.

We use money every day to pay for things we buy.
Thousands of years ago, the money was not used. Instead, man had the “barter” system. This meant that if one wanted something he had, he had to find someone who had this thing. Then he had to offer him something in exchange. And if that person didn't like what he was offered, the first man couldn't get what he needed.
Over time, certain things were used as money, because virtually everyone would take these things in exchange. In the past people used shells, beads, beans, cocoa, salt, grain, tobacco, leather, and even cattle. But coins are much easier to use than, say, cattle. Them easy to store and carry.
They were first made from either gold or silver. They were imprinted with the brand name. Printing was showing how much each coin was worth.
Later, people began to use coins made of cheaper metals. Metal just had no value, but the coins still had value on the basis of printing, imprinted on them. People have also started to use paper money. No longer mattered that the money itself had no real value. This is the kind of money we use today.