* Phototropism: Plants move their leaves and stems in response to sunlight. This allows them to maximize their exposure to the sun's rays, which is necessary for photosynthesis.
* Geotropism: Plants move their roots down into the ground in response to gravity. This helps them to anchor themselves in the soil and to access water and nutrients.
* Hydrotropism: Plants move their roots toward water. This helps them to find water sources, even when they are buried deep underground.
* Thigmotropism: Plants move their stems and leaves in response to touch. This can be a defense mechanism, helping plants to avoid being eaten by animals.
* Nastic movements: These are rapid, coordinated movements that are not directional. Examples of nastic movements include the opening and closing of flowers, the folding of leaves, and the coiling of tendrils.