The rate of formation of new organic matter by consumers is termed as:-
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Secondary Productivity
Option (4) Secondary Productivity — Correct. Of the options, only secondary productivity refers to consumers; gross and net primary productivity refer to plants.
NCERT Extract:
Productivity – “… Net primary productivity is the available biomass for the consumption to heterotrophs (herbiviores and decomposers). Secondary productivity is defined as the rate of formation of new organic matter by consumers.”