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Jawaban:
86. D
87. A
88. C
89. B
90. B

#86
D. Chlorine ion
(Ada di line 3 - 4)

#87
A. Pacific Ocean
(Ada di line 10 - 12)

#88
C. Oceanographers
(Ada di line 18)

#89
B. Flourish
Flourish artinya berkembang
Evolve artinya berkembang

#90
B. Are explained in
Are expressed in artinya dinyatakan dalam
Are explained in artinya dijelaskan dalam