How does the change in shape help the worm move forward

Earthworms are adapted for life underground. Their streamlined shape allows them to burrow through soil. The earthworm withdraws the front setae and uses its rear setae to anchor itself at the back. The earthworm uses.

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explanation:

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.