PLEASE HELP!! Coquina is rock made from animal shells that have been cemented together. In which environment did this rock sample most likely form?

A) Aboveground, near an active volcano.

B) At the bottom of an ocean.

C) Underground, near a tectonic plate boundary.

D) At the bottom of a river that feeds into a lake.

Most likely at the bottom of the ocean or river

but its probably the ocean

segmentation=endoskeleton=backbone=coelom=tissues

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides