61. A) classification
B) definition
C) function
D) perception(C)
62. A) that
B) it
C) as
D) what(A)
63. A) native
B) human
C) physical
D) animal(D)
64. A) ways
B) means
C) methods
D) approaches(B)
65. A) mating
B) exciting
C) warning
D) boring(C)
66. A) identical
B) similar
C) different
D) unfamiliar(C)
67. A) But
B) Therefore
C) Afterwards
D) Furthermore(A)
68. A) about
B) with
C) from
D) in(C)
69. A) infer
B) explain
C) interpret
D) express(D)
70. A) encourages
B) enables
C) enforces
D) ensures(B)