Answer :
Final answer:
Coquina indicates the highest energy carbonate environment as it consists of loosely-cemented shells and shell fragments, implying strong wave or current activity for its formation. Option c is correct.
Explanation:
The sedimentary rock that indicates the highest energy carbonate environment is coquina. Coquina is a type of limestone formed from beach sands made predominantly of shells that were then lithified. It is composed of loosely-cemented shells and shell fragments.
A high energy environment is required to accumulate and cement these fragments, which suggests that coquina forms in areas with strong wave or current action capable of transporting and depositing shell material.
