Question

you shiver when you are cold, the cold represents a biotic factor cell response stimulus

Explanation:

In biology, a stimulus is a change in the environment that elicits a response. Cold is an environmental change that causes the body's response of shivering. Biotic factors are living - related factors, a cell is a basic unit of life, and the response is the shivering itself. So cold is a stimulus.

Answer:

D. Stimulus