Consider a theoretical organism that utilizes silicon as its primary structural element instead of carbon. Assuming all other characteristics of life are present, which fundamental biological process would be MOST significantly challenged by this substitution?

Read the following statements:

A. Photoperiod affects reproduction in seasonal breeders, both plants and animals

B. Increase in body mass is considered as reproduction

C. Metabolism is a defining feature of all living organism without exception

D. Self consciousness is a defining property of every living organism

Choose the correct statements