Explanation:

Savanna, also spelled savannah, is a vegetation type that grows under hot, seasonally dry climatic conditions and is characterized by an open tree canopy (i.e., scattered trees) above a continuous tall grass understory.

Features of Savanah: 

• This region is marked by an extreme diurnal range of temperature. Days are hot and during the hot season, noon temperatures of around 40 degree Celsius are common. When night falls, the clear sky which promotes intense heating during the day also causes rapid radiation in the night. Temperature drops to around 10-degree Celsius.
• Trees are always present with the grasses. Grasses are tall and the trees are short. These regions are also known as parklands or bush veldts.
• It is mainly confined within the tropics. It is best developed in Sudan where dry and wet season is distinct