What is the author’s purpose to mention a study of serious abdominal injuries

A．He keeps the egg warm.
B．He builds a nest for the egg.
C．He defends the colony.
D．He gathers food for the females.

A．He would run away to hide.
B．He would send signals with a mirror.
C．He would set a fire.
D．He would ride a small horse in a large circle.