Keema and Diego go fishing every year at the same lake. This year they notice they are not catching as much fish as they normally do. Keema says to Diego, “I think there are fewer fish than last year because of higher levels of pollution from the power plant that was built down the road last year.”Keema’s statement is

Keema offers a testable explanation for why they are catching fewer fish: pollution from the new power plant may have reduced the fish population. A proposed, testable explanation is a hypothesis. The fact that they are catching fewer fish is an observation, but Keema’s claim about its cause is not.

AI-written and checked against the verified answer.