World population stops growing
Plant-like protists get there food from photosynthesis, which is the process of converting sunlight into energy.
The answer would be Sputnik 1. This was a Russian space probe launched during the Space Race between the Soviet Union and the United States.
I think the answer is trees
After a caterpillar eats a leaf, it can convert the chemical energy into mechanical energy to help it build a cocoon.
