What type of organism is a primary consumer?

Primary consumers are plant eating or herbivores that feed on plants that prepare their own food through photosynthesis.

Explanation:

Primary consumers (like cow, sheep ,deer ,etc)derive their nutrition from primary producers like green plants that prepare their own food by the process of photo synthesis. Primary consumers  form the second tropic level and are eaten by 'secondary consumers' or 'carnivores' (flesh-eating animals), tertiary consumers (carnivorous predators like tiger,lion, etc) or apex predators are at top of the 'food chain' like eagles that can consume any animal.

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.