The movement of tectonic plates causes volcanic eruptions, and large volcanic eruptions can decrease (reduce)the earth's average temperature by (a) emitting particles into the stratosphere, thereby increasing the albedo. Given these facts, what effect could more active plate tectonics have on the earth among the following options:
- rapid expansion
 - Decreased precipitation
 - a tree falling
 - the production of heat
 - Lower average temperature
 - Physical weathering
 - a lot of human deaths
 - Plant growth is reduced


 

     Lower average temperature    