Which of the following is NOT mentioned in the pas...

Câu hỏi: Which of the following is NOT mentioned in the passage as an advantage derived by birds that huddle together while sleeping?

A Staying together provides a greater amount of heat for the whole flock

B Some members of the flock warn others of impending dangers.

C Some birds in the flock function as information centers for others who are looking for food.

D Several members of the flock care for the young.