Hint: Savannahs have widely spaced trees with open canopies. This allows sufficient light to reach the ground to support the grass-based layers. These grasslands are located within \[30\] degrees of earth’s equator and usually found between tropical rainforests and deserts. The climate is warm ranging from \[25\] to \[30\] degrees Celsius.
Complete answer: Savannahs are a mixed woodland-grassland ecosystem which is present between the two tropics, the Tropic of Cancer to the north and the Tropic of Capricorn to the south. The savannah covers over half of Africa, most of South America and portions of Asia such as India. Climate here varies with the pre-existing season. There are two distinct seasons namely the wet season and dry season. The wet season comes during the summer while the dry season comes during the winter. Most of the rainfall is in the wet season. The soil in this ecosystem is very poor in terms of fertility. This is mainly due to less amount of nutrients present in the soil. However, some amount of nutrients is present in the soil surface due to the decaying of organic matter. The trees and grasses grow in the savannah ecosystem. The grasses grow to heights of \[80cm\] to \[350cm\]. Many grazing animals such as zebras, gazelles, warthogs, elephants and kangaroos are found.
Note: Each ecosystem has its importance in maintaining proper balance in the environment. Savannahs are subjected to regular wildfires and it's mainly due to anthropogenic reasons. However, the wildfire is helpful in preventing the overgrowth and spread of tree canopies thus helping small grasses and herbs survive.