Which ocean condition(s) would result in downwelling?

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.

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?

What changes the stability of the element