Which of the following is not a mechanism for biological evolution?

a. Mutation

b. Genetic drift

c. Inheritance of acquired characteristic

d. Natural selection

I would say D. natrural selection

Mutation is random, natural selection isn't random because those mutations which are most adaptable to the environmental conditions of the time are those which produce more offspring. I mean, "selection", by definition, isn't "random". The clue is in the title. It's not considered random for the simple reason that it's not random. Natural selection is an extremely deterministic process. So, it's (D) Natural Selection