NEET BIOLOGY

Detailed explanation-1: -Although there is some disagreement, several types of marine ecosystems are largely agreed on: estuaries, salt marshes, mangrove forests, coral reefs, the open ocean, and the deep-sea ocean. An estuary is a coastal zone where oceans meet rivers.

Detailed explanation-2: -Estuaries, or transitional waters, represent the transition between freshwater and marine environments and are influenced by both aquatic realms. Salinity levels are indicative of the position within the mixing zones of an estuary.

Detailed explanation-3: -The four major types of estuaries classified by their geology are drowned river valley, bar-built, tectonic, and fjords.

Detailed explanation-4: -Estuaries are areas of water and shoreline where rivers meet the ocean or another large body of water, such as one of the Great Lakes.

Detailed explanation-5: -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. However, there are also several types of entirely freshwater ecosystems that have many similar characteristics to the traditional brackish estuaries.