Respuesta :

It is true that a cay is a small, low island composed largely of coral or sand. It may be especially be found on the islands in Spanish America. That is a sandy island on a surface of a coral reef. 

The answer is:

True.

The google definition of a cay is

"cay

/kā,kē/

noun

noun: cay; plural noun: cays


   a low bank or reef of coral, rock, or sand."