Concept:Thick bark in savanna trees is an adaptation for survival in an environment prone to frequent bush fires.Explanation:Savanna habitats experience dry seasons with regular bush fires.A thick, corky bark acts as a protective insulating layer around the trunk.It shields the inner living tissues such as the cambium and phloem from intense heat and flames.This allows the tree to survive and regrow after fires.Water loss occurs mainly through leaves, not bark, so reducing transpiration is not the primary role.Answer:D. Resist bush fires