Answer
Option (a) is correct
Work Step by Step
Only the male stickleback fish with red bellies were attacked by the black bellied stickleback fish. Hence, red belly was the stimulus.
Biology 2010 Student Edition
by Miller, Kenneth R.; Levine, Joseph S.
Published by
Prentice Hall
ISBN 10:
9780133669510
ISBN 13:
978-0-13366-951-0
Chapter 29, Animal Behavior - Standardized Test Prep - Page 857: 6
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