Which of the following is the best example of artificial selection?

bees pollinating different species of flowers

adaptation of finches to different sources of food on different islands

an isolated population of frogs develops a phenotype distinct from the original population

breeding of horses for speed

Question

Which of the following is the best example of artificial selection?

		
bees pollinating different species of flowers
		
adaptation of finches to different sources of food on different islands
		
an isolated population of frogs develops a phenotype distinct from the original population
		
breeding of horses for speed

anonymous · Answer

It's probably the last option: breeding of horses for speed. 

We're looking for "artificial selection" here. 

The first three choices are Natural Selection; they occur in nature.