Of the following choices, which is the best way to earth’s water supply last for future generations? a. avoid drip irrigation systems on farms? b. make factories recycle water. c. build thermal power plants. d. increase neighborhood lawn sprinkling.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

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