Drought-tolerant species are plants that can survive with minimal water. These species have adapted to dry conditions through various mechanisms, such as deep root systems, thick leaves, or waxy coatings that reduce water loss. Common examples include cacti, succulents, and certain types of grasses. These plants are essential for maintaining ecosystems in arid regions and are often used in landscaping to conserve water. By choosing drought-tolerant species, gardeners can create beautiful, sustainable gardens that require less irrigation, helping to preserve water resources in areas prone to drought.