What ultimately controls the presence of different receptors for different tastes?

The taste system acts in tune with the olfactory and controls the presence of different receptors for different tastes.

Explanation:

The taste system acts in tune with the olfactory system to respond to the different stimuli of food acceptance. In the brain, information from taste buds combines with olfactory sensory information for taste perception. The perception of taste involves only the sense of taste, by stimulating sensory receptors known as taste cells or taste cells. Thus, taste perception is responsible for some food choices and can help in defining what will or will not be consumed. This can be very helpful in avoiding eating spoiled food or encouraging salivation to receive food.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.