One feature that amphibians and humans have in common is the number of circuits for circulation. (option C)
The similarities between amphibians and humans
Humans and frogs both have similar neurological, circulatory, digestive, and breathing systems. Both are considered to be vertebrates since they have a spine and body-wide nerves. Frogs and humans both have highly developed hearing senses that are controlled by the neurological system.
Amphibians, reptiles, birds, and mammals have two circuits for blood flow: one runs through the lungs and returns to the heart; the other travels through the remainder of the body and its organs, including the brain (systemic circulation).
Learn more about circulatory system here: https://brainly.com/question/3695187
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