Final answer:
Plants respond to light through photoperiodism, photomorphogenesis, and phototropism.
Explanation:
Photoperiodism is the response of a plant to the changing period of time that light is available, allowing plants to track time of day and year using various wavelengths of sunlight. Photomorphogenesis is the growth and development of plants in response to light, optimizing their use of light and space. Phototropism is a directional response where plants grow toward or away from light based on their needs.
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