Because they provide a predictable income
<span>According to Darwin's theory of evolution, which organisms are BEST able to survive in nature are </span>organisms that possess overall characteristics best suited to their environment.
Yes, because if it is not his/her self-interest they will not be able to work as hard as they can and won’t fully participate, while if they wanted to do it, they could go all out as it is something they want to achieve.
No because the lumur are forwardvision and opposable thumbs.And humans they are walking upright and verbal language