Fact 1: The movement of tectonic plates causes volcanic eruptions.

Fact 2: Large volcanic eruptions can decrease (reduce)the earth's average temperature by (a) emitting particles into the stratosphere, thereby increasing the albedo.

Given the two facts above, answer the question "What effect could more active plate tectonics have on the earth?" with 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    