Which of the following will most likely result if all of the primary consumers are removed from this ecosystem?

Secondary consumers will lower in numbers and the producers (plants) will be overabundant.

Explanation:

Okay so secondary consumers eat the primary consumers and the primary consumers eat the producers (plants). If there are no primary consumers, there is no one eating the plants which will lead to the producer population growing because there's less stopping them from growing in numbers. The secondary consumers will be in trouble because the secondary consumers don't eat plants. If there are no primary consumers, the secondary consumers won't be able to eat and the numbers of secondary consumers will decrease.