What causes the hump in the toad's back? A. Accumulation of fat reserves. B. Presence of specialized glands. C. Unique bone structure. D. Genetic variation.
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Answer

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Step 1
I'll solve this problem by carefully analyzing the characteristics of toads and their anatomy.

Step 2
: Understand the Anatomy of Toads

Toads have a distinctive hump or raised back, which serves a specific biological purpose. To determine the cause, we need to examine the key anatomical features.

Final Answer

Presence of specialized glands Explanation: The hump in a toad's back is primarily caused by the parotoid glands, which are critical for the toad's defense mechanism. These glands secrete toxic substances that help protect toads from potential predators.