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

Fact 2: Plants can be divided at any time, although the dormant or rest period is best.

Given the two facts above, answer the question "What do many plants do to respond to the shorter days in fall?" with the following options: 
- go through a resting period
 - changing the phase
 - Release energy
 - Generating heat
 - produce more pollen
 - colder and wetter
 - grow taller
 - make more chlorophyll


 

 go through a resting period        