7. Which of these is NOT a fact?

A. All food chains begin with animal protein.

B. Third-level consumers are also called tertiary consumers.

C. Herbivores are first-level consumers.

D. An ecosystem must have many primary producers to support a pyramid of consumers

A). All food chains begin with animal protein.

Explanation:

As per the question, option A i. e. 'All food chains begin with animal protein' does not demonstrate a fact as food chains do not always begin with the animal protein. Some food chains begin with 'sunlight' where the plants receive the energy from the sun to synthesize food which is further consumed by herbivores and these plant-eating animals are later consumed by the carnivores and so on. For example; sun - producer - primary consumer - secondary consumer - tertiary consumer. Thus, the statement does not assert a claim that is steady with the objective reality as it could not be proven true with sufficient evidences. Thus, option A is the correct answer.

A. All food chains begin with animal protein. Is false I believe.