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A

Explanation:

The primary consumers will multiply and over populate

The answer is the 1st one, First order consumers would over populate an area.

Since first order consumers are herbivores and are usually prey for meat-eating animals. They would no longer be eaten and overpopulate.

answer; interval;

option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).