Which term defines the way that one views of themselves overall?

Which of the following explains why a tree is often used as a model to represent the principle of common descent

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.

How does the structure of fats enable them to hold so much energy?