Concept:All sentences except one relate to a common topic; the odd sentence belongs to a different context.
Explanation:Sentence A talks about summer being enjoyable for kids.
Sentence B describes high temperature and quick evaporation, which is typical of summer.
Sentence D mentions the duration of summer from March to July.
Sentence E states that summer is the hottest season.
Thus, A, B, D, and E all relate to the summer season.
Sentence C talks about human activities damaging the environment, which is unrelated to summer.
Therefore, sentence C is the odd one out.
Answer:Option C