One type of organism is responsible for "fixing" nitrogen or helping to put it in a form so other living things can use it. That organism is A) bacteria. B) fungi. C) plants. D) viruses.

A

Explanation:

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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.