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Olin [163]
3 years ago
14

Which is an external stimulus? A. Thirst B. Hunger C. Pain D. Heat

Biology
2 answers:
Vlada [557]3 years ago
8 0
D. Heat, heat is an external stimulus. An external stimulus is a signal that originates from outside an organism.
Liula [17]3 years ago
3 0
C.Pain is the answer.
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