Answer:
Vestigial organs show traits that a species once needed to have to perform certain tasks
Explanation:
A. producers
producers=plants=autotrophs
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The sensory receptors located on a frog's head assist it in the water through protection and flotation. The receptors hold the frogs head above the water, and the frog uses this as an advantage to see if there is any predators or prey around to help it survive. Hope this helps!