Many plants respond to the days growing shorter in the fall by going dormant, and cottonwoods are dormant during the fall. Given these facts, what happens to cottonwoods when the days get shorter among 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       