Question

the text below describes how an areas environment changed over time. read the text. then answer the question. fine sediment was deposited on the floor of a deep ocean. over thousands of years, the sea level fell. the area became a shallow part of the ocean. a coral reef started growing on top of the older sediment. over time, a layer of sediment was deposited on the floor of the reef. this sediment was made mostly of the shells of marine organisms. how did the sediment deposited in this area change over time? first, a layer of sediment made up of the shells of marine organisms was deposited. later, a layer of mud was deposited. first, a layer of mud was deposited. later, a layer of sediment made up of the shells of marine organisms was deposited.

Explanation:

The text states that first fine sediment (which is like mud in a sense) was deposited on the deep - ocean floor. Then, after the sea level fell and a coral reef formed, a layer of sediment made of marine organism shells was deposited.

Answer:

First, a layer of mud was deposited. Later, a layer of sediment made up of the shells of marine organisms was deposited.