Concept:Tropical rain forests have tall trees with buttress roots and evergreen leaves.Explanation:In tropical rain forests, trees grow very tall and close together.Buttress roots are large, root-like supports at the base of the trunk.They help stabilise the tall trees in the shallow rainforest soil.Evergreen leaves allow the trees to photosynthesise throughout the year.These features are not typical of savanna or temperate grassland vegetation.Answer:C. tropical rain forests