Temperatures in ponds and lakes vary by season.

True

Explanation:

The temperature of rivers and lakes is a variable of unstable behavior, because it varies in relation to the temperature that the environment is subjected. The ambient temperature would come according to the season. As you may already know, the environment usually gets colder in winter and fall, as summer and spring have warmer temperatures. The temperature of rivers and lakes, vary in relation to the season of the moment. So the correct answer to your question is "true".

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