Answer:
D.
Explanation:
A. just isn't true. B. isn't true either because, like bacteria, we are adapting to their changes. C. isn't right either because some bacteria helps us survive. D. is the only true statement.
The answer is true because it is controlled
The correct answer to this question is:
A.
Stomach
The stomach is one of the organs of the digestive system. It
has strong muscular walls which hold and digest food. Enzymes break down food
into liquid or paste which prepares the small intestine.
