Correct Answer: Option D

Explanation

Species I thrives under conditions of moderate to high rainfall because as rainfall gradually increases, the number of organisms increases as well.

Specie II is not only found in locations where it rains all year round because even at point zero where there was no rainfall, the number of the organisms remained at 200/km\(^2\).

Species III decreases in number as rainfall increases, which means increase in rainfall does not favour them.

Species IV increases in number gradually as rainfall increases, got to a peak and started decreasing in number again which means its distribution is dependent on rainfall.

Therefore, the correct option is D.   

There is an explanation video available below.

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