What does an author use to control the pacing of a story?

An author can control the pacing of a story by changing the sentence structure or how quickly events unfold in a story. Pacing is a tool used in literature intended to control the speed and rhythm at which a story is told and the readers are pulled through the events.

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.