Question

Oasis is found in ______________-
(a) Grasslands
(b) Deserts
(c) Mediterranean regions
(d) Polar region

Answer 1

Hint:
This area is generally a small, fertile or green area with a spring or well. It is a desolate region of landscape where no rainfall exists and living conditions for plant and animal life are thus aggressive. The absence of foliage exposes the soil's unprotected surface to denudation processes.

Complete answer:
 In a desert or semi-desert setting, Oasis is a fertile place (often with a date palm grove). You can find environments for animals and plants. Oases are found in the desert or arid areas of the Arabian Peninsula, the Sahara Desert and in many other desert regions of the country. A special water landform surrounded by desert is an oasis. It has an underground supply of water and supports plants and animal life. While there are many oases in the deserts of the planet, because of the immense distance between them, they are not always easy to get to. Underground water bodies or aquifers provide the bulk of oases of water sources. These natural springs may spontaneously rise to the surface, or individuals may dig into the earth to release the water. This encourages the water to keep the soil fertile: this ensures that the soil has nutrients, such that plants can expand. In an oasis, plant life will begin first when birds carrying seeds stop for water. Then the water supply is often drawn to other species, and people may prefer to live there. Several springs or wells can be fed by the same aquifer. In certain desert garden towns, these wells have been continuously maintained because the people of the region know how important maintaining their water supply is. As little as an acre or thousands of square miles of land, an oasis may be.

Hence, the correct answer is option B.

Note:
Any wide area of field that is exceptionally dry. A population of plants and animals has evolved uniquely to the harsh conditions in this ecosystem. The climate in this area. When streams of freshwater such as underground rivers or aquifers irrigate the soil naturally, oases are rendered fertile. It is unusual to see water on the soil or underwater in these areas.