Read this excerpt from a blog. I was alarmed to discover that local farmers are increasing their use of pesticides on wheat fields. While these chemicals help to get rid of the insects that damage the crops, they also cause great harm to butterfly and honey bee populations. These insects are a necessary part of our ecosystem because they spread pollen that allows our plants, flowers, and crops to grow.

Which sentence would help the author develop the claim that pesticides harm butterfly and honeybee populations?

Scientists believe that there are more than fifteen kinds of honeybees and twenty thousand species of butterflies in the world today.
A recent study found that butterfly and honeybee populations decreased by sixty percent in areas that used pesticides.
The chemicals found in pesticides can become absorbed into the soil and affect humans’ food and water supplies.
Farmers argue that today’s pesticides target only the insects that destroy wheat and corn crops.