Final answer:
Savannas are diverse biomes with grasslands and scattered trees, found in Africa, South America, and Australia; they have a hot climate, substantial yet seasonal rainfall, and an extensive dry season with regularly occurring fires that shape the ecosystem.
Step-by-step explanation:
Savannas are biomes characterized by grassland ecosystems with scattered trees, found in various parts of the world including Africa, South America, and northern Australia. These areas experience hot, tropical climates with average temperatures ranging from 24°C to 29°C (75°F to 84°F) accompanied by moderate to high annual rainfall of 51-127 cm (20-50 in).
An important feature of savannas is their extensive dry season, which can influence the distribution and growth of trees. Furthermore, due to regular fires, the plants in this biome have evolved complex root systems that allow them to quickly recover post-disturbance.
In Africa's tropical savannas such as the Serengeti, one can witness immense biodiversity, substantial animal migrations, and varying amounts of rainfall depending on the region. Despite the arid conditions, these regions are not devoid of life but instead, support a multitude of species adapted to the unique climatic conditions of the savanna.