Final answer:
Geography - Deserts and their characteristics
Step-by-step explanation:
The subject of this question is Geography. Geography is the study of the Earth's physical features, climate, and the distribution of plants, animals, and human populations. It includes the study of different landforms and regions, such as deserts.
The statement that all deserts have cactus plants is incorrect. While some deserts do have cactus plants, not all deserts have them. Cacti are adapted to survive in arid conditions, but there are other types of plants that exist in deserts.
However, it is true that deserts generally receive only a small amount of rainfall, making them dry and arid environments. This lack of rainfall is due to factors such as low moisture levels and geographical factors that prevent rain clouds from reaching these areas.
Deserts can be very hot during summer months due to their climate and proximity to the equator. The lack of vegetation and water means there is little shade and moisture to keep the air and ground cool.
Lastly, although many deserts do have sand, not all of them are solely made up of sand. Some deserts have rocky or gravelly terrain instead.
Learn more about Deserts