Как переводится whales are the biggest animals in the sea

Нормально:   киты - самые большие морские животные.  дословно: киты - самые большие животные в море. 

Киты самые большие животные(обитатели) океана или в океане

slavery  is, in the strictest sense of the term, any system in which principles of  property law  are applied to people, allowing individuals to own, buy and sell other individuals, as a  de jure  form of  property.  a slave is unable to withdraw unilaterally from such an arrangement and works without  remuneration. many scholars now use the term  chattel slavery  to refer to this specific sense of legalised,  de jure  slavery. in a broader sense, however, the word slavery may also refer to any situation in which an individual is  de facto  forced to work against his or her will. scholars also use the more generic terms such as  unfree labour  or  forced labour, to refer to such situations.however – and especially under slavery in broader senses of the word – slaves may have some rights and/or protections, according to laws and/or customs.

slavery began to exist before written history, in many  cultures.  a person could become a slave from the time of their birth, capture, or purchase.

while slavery was institutionally recognized by most societies, it has now been  outlawed  in all recognized countries,  the last being  mauritania  in 2007. nevertheless, there are still more slaves today than at any previous point in history: an estimated 45 million people remain enslaved worldwide.the most common form of the slave trade is now commonly referred to as  human trafficking. chattel slavery is also  still practiced by the islamic state of iraq and the levant. in other areas, slavery (or unfree labour) continues through practices such as  debt bondage,  serfdom,  domestic servants  kept in captivity, certain adoptions in which children are forced to work as slaves,  child soldiers, and  forced marriage.

Today we try to judge on the subject "slavery". i'm certainly against slavery, but opinions are different, but most fold to the answer "against". slavery, this is a very bad thing. if you become a slave, then it will be difficult for you to get out of them. of course, this is for life. all my life i work just like that, if only you were given a piece of food and water was given. not what entertainment, not what kind of children, not what romance, personal life. it seems that the meaning of life is lost. you work hard, work hard, work hard, but you will not be thankful enough for yourself. the worst thing about slavery is that innocent children are automatically slaves, and they do not have the right to choose. and most importantly, with slaves not when they were not treated like people, they were beaten, beaten, killed, sold. slavery, a very bad thing. i'm against slavery.