As Shown in the Figure Below,the Net Primary Productivity (NPP)in

Multiple Choice

As shown in the figure below,the net primary productivity (NPP) in terrestrial biomes around the world is greatest in areas near the Equator that also receive high amounts of yearly rainfall.This pattern of NPP in terrestrial ecosystems suggests that

A) terrestrial productivity is highly sensitive to temperature and available sunlight.
B) without shade from overhead vegetation, marine productivity typically exceeds that found in terrestrial ecosystems.
C) neither sunlight nor temperature limits terrestrial ecosystems.
D) most terrestrial productivity results from the input of marine-derived nutrients.