Question

trees, shrubs, flowers → plants
which of the following answer choices represents an accurate model of a food chain within the ecosystem?
a. fox → frog → squirrel → trees
b. trees → squirrel → snake → fox
c. fox ← frog ← squirrel ← trees
d. tree ← squirrel ← frog ← fox

Explanation:

A food chain shows the flow of energy from producers (plants) to consumers. Producers are at the start, then primary consumers (herbivores), then secondary, etc. Option A has a predator (fox) at the start, wrong. Option C has arrows pointing backward (energy flows forward, from food to eater), wrong. Option D has a plant at the end and a predator at the start, wrong. Option B: Trees (producer) → Squirrel (primary consumer, eats trees) → Snake (secondary, eats squirrel) → Fox (tertiary, eats snake) follows energy flow.

Answer:

B. TREES → SQUIRREL → SNAKE → FOX