The picture below shows white storks nesting on the top of a building. Birds in urban environments often make their nests high on building ledges and roofs. Which of the following is a quality of building ledges and roofs in urban environments that lead birds to nest there?
A.
High nests allow birds to easily collect water when it rains.
B.
High nests reduce the number of predators that can reach baby birds.
C.
High nests increase the number of parasites that are present.
D.
High nests allow birds to remain cool in the heat of the summer.