500
Read this paragraph from the story.
Most birds build nests for their eggs. But on the ice in Antarctica, there are no twigs or leaves. There is no grass or mud. Nothing to build a nest with. Nothing but snow and ice.
What is the paragraph mostly about?
A: Why grass does not grow in Antarctica
B:Why birds in Antarctica cannot build nests
C:Why most birds build nests of twigs and leaves
D:Why most nests are made of twigs, leaves, grass, and mud
Why birds in Antarctica cannot build nests