Concept:Tropical savanna is a grassland zone with scattered trees that are specially adapted to survive seasonal drought.
Explanation:Savanna regions experience a distinct dry season.
Only trees that can survive prolonged periods without water remain there.
Such trees are known as drought-resistant trees.
Examples include the acacia and the baobab.
They have deep roots, thick bark, and small leaves to reduce water loss.
These features help them cope with the harsh dry conditions of the savanna.
The other options are incorrect because broad-leaved trees belong to the tropical rainforest.
Palm trees and thorny scrub are typical of desert margins or the Sahel.
Scattered evergreen trees do not describe savanna vegetation, since most savanna trees shed their leaves during the dry season.
Answer:Tropical savanna vegetation is characterized by drought-resistant trees (Option A).