Habitat is not necessarily a geographical area, it can be anywhere that living organisms dwell. Organisms that live in water are called Aquatic organism. Some dwell in Fresh water, that is water that does not have salt in it.
The term “Terrestrial” in Biology is generally used to describe living organisms that live and grow on land.
Arid land - A region is arid when it is characterized by a severe lack of available water, to the extent of hindering or preventing the growth and development of plant and animal life. Environments subject to arid climates tend to lack vegetation
Terrestrial habitat is a habitat that is found predominantly on land. Forest habitats may be broadly defined as those in which trees are a significant component.
Semi-natural or man-made habitats such as national parks or biosphere reserve also constitute Terrestrial habitats.
Grassland - Area in which the vegetation is dominated by a nearly continuous cover of grasses.
Terrestrial habitats are ones that are found on land, like forests, grasslands, deserts, shorelines, and wetlands. A marsh land is a wetland that is dominated by herbaceous plant species.