Concept:Gross secondary productivity refers to the total biomass gained by a consumer (animal), including all energy assimilated from its food.
Explanation:Biomass gain in an animal is measured as secondary productivity.
Gross secondary productivity includes all the energy absorbed from the food consumed.
This energy is stored as body tissue, fat, and other organic matter.
It does not subtract energy lost through respiration or waste.
Net secondary productivity, on the other hand, is the biomass left after respiration losses are removed.
Primary productivity terms (gross/net primary) apply only to producers like plants, not animals.
Therefore, the total gain in biomass by an animal is correctly called gross secondary productivity.
Answer:Option B – Gross Secondary Productivity