What would happen in an ecosystem without herbivores? a. the populations of secondary consumers would decrease.. b. the populations of primary producers would decrease. c. the populations of secondary consumers would increase.. d. the populations of primary consumers would increase.

I believe the correct response is A. The population of secondary consumers would decrease, as now these organisms can't obtain energy through the food they consume which is the primary consumers as there is none and thus the population in higher tropic level dependent on them would decrease. This is the secondary consumer.

Processes above and be sure to mention the movement of electrons and energy as the carbon atom moves from one reaction to another.