What do plants respond to?
Options:
- (A) Energy.
- (B) heat produced
- (C) Chemical energy
- (D) sun's heat
- (E) the environment
- (F) heat energy
- (G) Sulfur dioxide
- (H) temperature Let's solve this problem gradually.
Plants respond to daily and seasonal cycles and to disease. Temperature follows a seasonal cycle. Plants respond to temperature. So the final answer is (H).