Correct Option
Epiphytes are plants that grow on the surface of other plants, depending on them solely for mechanical support and a vantage point to access sunlight and air circulation. They are non-parasitic, meaning they do not derive nutrients or water from their host plant. Instead, epiphytes are autotrophic, synthesizing their own food through photosynthesis, and absorb moisture and essential nutrients directly from the atmosphere, rainfall, and accumulated organic debris. Common examples include various species of tropical orchids, ferns, and mosses.
Incorrect Options
Option (a) is incorrect. Epiphytes are capable of photosynthesis and thus produce their own food. They do not depend on the host plant for nutritional sustenance.
Option (c) is incorrect. While epiphytes may grow in shaded environments, their primary dependence on other plants is for structural support, not specifically for shade. Their elevated position often allows them to access more light than ground-dwelling plants.
Option (d) is incorrect. Epiphytes obtain their water requirements from atmospheric sources such as humidity and rainfall. They do not extract water from the host plant's vascular system.