4. In one to three paragraphs, describe dynamic changes that have occurred in the ecosystem
you chose. Consider whether your ecosystem is degraded, restored, or neither, and list
organisms that were once in the ecosystem but are no longer there.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

the backbone of the dna and rna compound is sugar phosphate.

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this