Concept:Savanna trees are adapted to survive periodic fires, seasonal drought, and high temperatures.
Their physical features help them store water and resist heat damage.
Explanation:A savanna is a grassland ecosystem with scattered trees and a dry, hot climate.
Fires occur frequently in savannas, especially during the dry season.
Trees that survive these fires must protect their inner living tissues from intense heat.
A thick, corky bark acts as an insulating layer against fire and excessive water loss.
Large, leathery leaves and thin, smooth barks are typical of rainforest plants, not savanna trees.
Straight slender stems with branches near the top are features of trees in dense forests where they compete for sunlight.
Therefore, the most important structural adaptation of savanna trees is the possession of thick, corky bark.
Answer:D. thick, corky bark