Standard Science Primary 6 Interactions

Study the food web below. If the population of Organism X decreases, the population of Organism Y increases. Which of the following correctly describes the relationship between X and Y?

A X and Y are both producers
B Y is a predator of X
C X and Y compete for the same food
D X is a predator of Y
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Worked Solution

Step 1: Analyze the population change (X decreases → Y increases). Step [2-9]: An increase in Y when its predator (X) is removed is a standard ecological response. Step [2-9]: Therefore, X must be the predator of Y.

Correct answer: X is a predator of Y

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