Question

a. the hawk is a quaternary consumer
b. the hawk is a tertiary consumer
c. the small fish are primary consumers
d. the large gren fish is a quaternary consumer.
e. the bottom layer of the energy pyramid shows producers

Explanation:

To solve this, we analyze each option based on ecological concepts (energy pyramid, trophic levels):

Option A:

Quaternary consumers are 4th - level consumers (eat tertiary consumers). If the hawk is at a level where it eats a tertiary consumer, it could be quaternary. But we need to check the context (though not fully given, let's assume a typical pyramid). However, let's check other options first.

Option B:

Tertiary consumers are 3rd - level (eat secondary consumers). Without full food chain, but let's check others.

Option C:

Primary consumers eat producers (plants/algae). Small fish eating producers would be primary, but if they eat other consumers, they aren’t. Without chain, but let's check E.

Option D:

Quaternary consumers are rare; large green fish is less likely to be 4th - level.

Option E:

The bottom layer of an energy pyramid always has producers (they capture energy, form the base). This is a fundamental ecological rule: energy pyramids start with producers (autotrophs) at the bottom, as they have the most energy and support all other levels.

• Option E is correct because the bottom layer of an energy pyramid consists of producers (organisms that make their own food, like plants or algae), which form the base of the energy flow in an ecosystem.
• For other options: A and B depend on the specific food chain (not fully provided), C depends on what small fish eat, and D is unlikely as quaternary consumers are rare and large green fish is not typically a 4th - level consumer.

Answer:

E. The bottom layer of the energy pyramid shows producers