Two closely related species such as chimpanzees and gorillas have different traits because they:
a. have a different genes.
b. look slightly different.
c. have different kinds of dna.
d. have different parents.

I'm not positive but I believe it is C. It definitely isn't A or D. C would include that they have different genes because of the different DNA's.

Explanation:

The answer is the option c. fact. Indeed facts are the events such as they occur, without interpretations or opinions. Facts happens and they can be observed by different means: you can get them through sense organs (eye, ear, mouth, skin, nose) or with instruments. When you report facts you must clearly state them appart of your interpretation or opinion.