Q: You are presented with the quiz "Producers use energy and inorganic molecules for what?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "producers use energy and inorganic molecules to make food" and "food preparation for retention of nutrients is included".   So, what's the best answer to the question?

Options: a. neutralizing threats; b. dismissal of nutrients; c. heat produced; d. Transfers energy; e. retention of nutrients; f. decomposition; g. agriculture; h. iron in water;
A:
e.