Why do biologists measure the number of trophic levels in an ecosystem? A. To find new treatments for diseases
B. To make it helpful for humans
C. To see if it has any food chains
D. To check its stability and health

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.