Read the following paragraph from the text Turning the Tide.
Artificial reefs can be built using many types of material. They can be made of limestone, steel, and concrete. Sometimes, structures that are no longer being used are recycled to create reefs. That is what happened with the Tappan Zee Bridge.
Which is a key phrase in this paragraph?
(1 point)
Responses
what happened
what happened
they can
they can
artificial reefs
artificial reefs
being used
being used
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