Read the following statements and pick out the correct option.
(a) Marine ecosystem is the largest and most stable of all the aquatic ecosystems.
(b) Estuarine ecosystem is an anthropogenic ecosystem.

Estuaries are not anthropogenic ecosystem.

Estuaries are bodies of water usually found where rivers meet the sea. Estuaries are home to unique plant and animal communities that have adapted to brackish water—a mixture of fresh water draining from the land and salty seawater.