Which sentence from the selection best explains why the black-backed woodpecker is able to build its unique type of home? A. this woodpecker relies on the environment of the burned forest. (Paragraph 2) B. this nest is usually built inside a tree trunk or a fallen log. (Paragraph 4) C. it also has a very thick skull bone and a strong neck: (paragraph 4) D. the woodpecker can move into the nest cavity as soon as it is drilled. (Paragraph 4)