Answer:
any external change in their environment that causes one phenotype to have an advantage over the other
Explanation:
There are a few possible answers here. A good example might be if the grass they live in turns brown after a long drought, leaving the green grasshoppers more visible to predators than brown ones.
A 16th century religious movement that attempted to reform the Roman Catholic Church
Answer:
You should not because this can cause a grease fire. Grease fires, unlike traditional fires, cannot be put out with water, which can increase the risk of the fire rapidly spreading.
