Correct option is A
A lagoon is a saltwater lake that is separated from the sea by sandbars, spits, or coral reefs.
These natural formations act as barriers, preventing the full flow of seawater into the lagoon while still allowing some exchange.
Lagoons are often shallow and are typically found along coastlines or in areas where land and sea meet.
Lagoons are usually saltwater lakes and are often found along coastlines, providing habitats for various marine species.
Examples: Famous examples of lagoons include the Chilika Lake in Odisha and the Kochi Backwaters in Kerala.
Lagoons can be protected areas for biodiversity making them important for environmental conservation.
Glacier: A glacier is a large mass of ice moving slowly over land.
Lake: A lake is an inland body of water.
Estuary: An estuary is a coastal area where freshwater from rivers meets and mixes with saltwater from the sea.