Fact 1: Plants detect and respond to the daily cycle of light and darkness.

Fact 2: Diurnal cycles Diurnal cycles are the daily cycles of light and darkness.

Given the two facts above, answer the question "What is the name of the light cycle that plants detect?" with the following options: 
- photons
 - three
 - Summer
 - diurnal
 - autumn
 - Energy.
 - Energy
 - sunlight


 

    diurnal     