How early was corn planted in what is now Arizona?

Smith: Maize [corn] was first introduced into the southwestern U.S. from Mexico through highland corridors along the Sierra Madre Mountains and first appeared in New Mexico or Arizona, that general area, some 4,000 years ago.

answer: hey improve the marine life in a certain area.

they provide a new location for fishermen to fish and which works to ease the pressure on natural reefs.

they are a great way to get rid of large objects that would otherwise be placed on landfills

explanation:

answer; the correct answer is (composition);