Fact 1: Many plants respond to the days growing shorter in the fall by going dormant.

Fact 2: Autumn or Fall is already here.

Given the two facts above, answer the question "How do many plants respond to days getting shorter in autumn?" with the following options: 
- Change colors
 - spread seed
 - Exfoliation
 - bioaerosols
 - grow a layer of fur
 - go dormant
 - adding heat
 - enlarge themselves


 

      go dormant   