Concept:Plants that survive in extremely dry conditions are classified by their water-related adaptations.Explanation:Xerophytes are specially adapted to live in very dry habitats such as deserts.They possess features that reduce water loss, like thick waxy cuticles, reduced leaves, or water storage tissues.These adaptations help them tolerate long periods without rainfall.Mesophytes grow in normal moisture conditions, hydrophytes grow in water, and angiosperms are flowering plants, not a dryness-related group.Answer:Xerophytes.