Answer
C. They are source of new genetic variation
Explanation
Mutation result in genetic changes allowing species to develop new traits because the DNA changes thus affecting how the living organism will behave, look and adjust to physiology processes. Through mutation, evolution has been achieved because living things can survive as they fit into new environment with new traits acquired through mutation.
Answer:
I believe your answer will be A. Inside spinal cord. :)
An ecological niche is an organism's specific habitat in an ecosystem.
It is where it lives and feeds, etc.
