Question

which statement explains how producers are dependent upon consumers for their survival?
a consumers supply oxygen for producers to undergo aerobic respiration.
b consumers produce carbon dioxide for producers to use during photosynthesis.
c consumers provide chemical energy needed by producers for cellular respiration.
d consumers make lactic acid that producers use in photosynthesis.

Explanation:

Producers (like plants) use carbon - dioxide for photosynthesis. Consumers, through respiration, produce carbon - dioxide which is a raw material for producers' photosynthesis. Oxygen for producers' aerobic respiration is produced by producers themselves during photosynthesis. Consumers do not provide chemical energy for producers' cellular respiration. Lactic acid made by consumers is not used by producers in photosynthesis.

Answer:

B. Consumers produce carbon dioxide for producers to use during photosynthesis.