Final answer:
The tropical biome characterized by grasslands, scattered trees, and seasonal fires found in parts of Africa, South America, and Australia is the savanna.
Step-by-step explanation:
The biome found in the tropical parts of Africa, South America, and Australia, characterized by extensive grasslands with occasional patches of trees and a common occurrence of fire, is the savanna.
Savannas are hot, tropical areas with temperatures generally ranging from 24°C to 29°C (75°F to 84°F) and have an annual rainfall of 10-127 cm (3.9-50 in).
They have a pronounced dry season, and due to frequent fires, the plants have adapted with well-developed root systems to quickly re-sprout after a fire.