How do the farmers use the property of density of cranberries to harvest the crop?

Farmers use the property of density of cranberries to harvest the crop because an object with a density less than, in this case, water, it will float.

When farmers flood cranberry bogs with water, they know that cranberries have a density less than about 1 g/mL. Because of this, cranberries will float to the top of water and can be easily harvested.

The flowers in a flower arrangement are actually alive

The answer is b because c don't explain why the moths are on them and it isn't a because as we know only one species of moth does this