Question

1. planet morona contains trogs, squirts, and zinks. one year the trog population increased. as a result, the squirt population decreased and the zink population increased. which is the most likely food chain?

trogs increase squirts decrease zinks increase
squirt → zink → trog
trog → squirt → zink
squirt → trog → zink
zink → trog → squirt

Explanation:

Step1: Analyze the relationship between populations

In a food chain, if a predator's population increases, its prey's population will decrease. Also, if a prey's population decreases, the predator of that prey (higher - level predator) which depends on the first - level predator as food may have its population affected.

Step2: Evaluate each option

• For the option \(Squirt\to Zink\to Trog\): If Trogs (top - level predators) increase, Zinks (middle - level predators) should decrease (because Trogs eat Zinks), but the problem states Zinks increase. So this option is wrong.
• For the option \(Trog\to Squirt\to Zink\): If Trogs (prey of Squirts) increase, Squirts (predators of Trogs) should increase (more food), but the problem states Squirts decrease. So this option is wrong.
• For the option \(Squirt\to Trog\to Zink\): If Squirts (prey of Trogs) are the food source for Trogs, when Trogs increase (more food from Squirts), Squirts decrease. And if Zinks (predators of Trogs) increase (because there are more Trogs as food), this option is consistent with the population changes.
• For the option \(Zink\to Trog\to Squirt\): If Zinks (prey of Trogs) increase, Trogs (predators of Zinks) should increase. But if Trogs (prey of Squirts) increase, Squirts (predators of Trogs) should increase (more food), but the problem states Squirts decrease. So this option is wrong.

Answer:

\(Squirt\to Trog\to Zink\)