Based on the desert food chain provided, which change in the ecosystem would have the greatest negative effect?
A.) A disease kills most of the owls
B.) Mouse population decreases due to widespread poison
C.) Grasshopper eggs fail to hatch due to flooding
D.) A drought that kills most of the grass

A drought that kills most of the grass would have the greatest deleterious effect on this food chain.

The picture shows a food chain that has grass first, Grasshopper second, mouse third, and owl fourth.

According to this graph, if a drought affects the first organism that is grass, the entire food chain would be affected because the grasshopper population would decrease due to lack of food, as well as mice and owls.

So, the correct answer is option D because it mentions the most damaging situation for this food chain.

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Explanation:

i guess it is a drought that kills most of the grass

due to it grass hoper may die and mouse would not have grass hoper to eat and owl would not eat mouse

not sure if this what   you'r looking for would be percent composition