4. How do enzymes affect the speed of a chemical reaction?

Enzymes are catalysts, meaning that they lower the activation energy. Lower activation energy allows for a faster process so enzymes speed up chemical reactions.

Explanation:

Enzymes are usually proteins that act on molecules called substrates and bind to a region of the enzyme, called the active site. This is the site where catalytic function occurs. The catalytic function is to reduce the activation energy necessary to start biochemical reactions, allowing the formation of a product to be quicker.

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.