If your choices are the following:
<span>a. A
b. B
c. C
d. D
</span>
Then the answer is C. Interneurons<span> create neural circuits so that there is a communication between sensory or motor </span>neurons<span> and the central nervous syste</span>
The variation may already exist within the population, but often the variation comes from a mutation, or a random change in an organism's genes.
