Vestigial organs like tail bones in humans are equivalent to the balance in the monkey, eyeballs in cavefish to the sight in whales, and pelvis bones to the attachment. Thus, the correct options are 1. b, 2. a, and 3. c.
What are vestigial organs?
The tissues and cells define vestigial organs, that was inherited from the ancestors but now do not have a specific purpose in the organism and are considered non-functional.
The tail bones in humans or the coccyx that were inherited from the common ancestor of the mammalian group are non-functional but in monkeys provide balance. Hence, option b is correct.
The eyeballs in cavefish are considered non-functional as they live in dark oceanic parts, on the other hand, these eyes are used as sight in whales. Hence, option a is correct.
The pelvis bones in whales are vestigial organs as they do not walk or jump, unlike the frogs with pelvis bones as the attachment joint. Hence, option c is correct.
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