A．Beavers are safer from their enemies at night.
B．Beavers stay with their offspring during the daytime.
C．Looking for food at night requires less energy.
D．Beavers face less competition for food from other animals.
A．It accurately represents the behavior of the dinosaur.
B．Its name resulted from an incorrect translation.
C．It was probably taking care of the eggs.
D．It influenced popular attitudes toward dinosaurs.
A．Parenting of the young by males.
B．Laying eggs in a nest.
C．Returning to the same nest site year after year.
D．Stealing eggs from the nests of other reptiles.
A．The dinosaurs' nesting behavior is same to that of the crocodiles and birds.
B．There are no common characteristic between dinosaurs, crocodiles and birds.
C．The dinosaurs have larger nests and more eggs than the crocodiles and birds.
D．The dinosaurs, crocodiles and birds all work together to guard their nest.