試題詳解

46. According to paragraph 2, what evidence indicates that aggression in animals is related to the hypothalamus?
(A) Animals who lack a hypothalamus display few aggressive tendencies.
(B) Some aggressive animal species have a highly developed hypothalamus.
(C) Animals behaving aggressively show increased activity in the hypothalamus.
(D) Electrical stimulation of the hypothalamus delays animals’ inborn reaction patterns.