what places are likely to support a large producer population?
A: Regions where there is no rainfall.
B: Areas with abundant water and sunlight.
C:Regions with few consumers.
D: Ecosystems with many decomposers.

In general, producer populations tend to thrive in areas with lots of water and light, so the answer would be "B: Areas with abundant water and sunlight." This of course isn't always the case, however.

the answer is B.because most of  organism need water and sunlight to support their live and their growth