Why do orchids have air roots and how do they help the plant survive in its natural environment?

Orchids have air roots to absorb moisture and nutrients from the air. These roots help the plant survive in its natural environment by allowing it to gather resources even when the soil is dry or lacking in nutrients. This adaptation helps orchids thrive in their often epiphytic or semi-epiphytic habitats, where they grow on trees or rocks rather than in the ground.