What do plants respond to?
Options:
- (A) Chemical energy
- (B) Vibrations
- (C) heat energy
- (D) Sulfur dioxide
- (E) Temperature
- (F) sun's heat
- (G) Clouds
- (H) Wood OK. Let's think hard:
Plants respond to daily and seasonal cycles and to disease. Temperature follows a seasonal cycle. Plants respond to temperature.
So, the final answer is (E).