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

Fact 2: Cottonwoods are dormant during the fall.

Given the two facts above, answer the question "What happens to cottonwoods when the days get shorter?" with the following options: 
- They bloom
 - They go dormant
 - Dehydration
 - It helps them survive
 - Exfoliation
 - They die
 - They reproduce
 - They may not survive.


 

  They go dormant       