Plants respond to changes in light intensity through a process called photomorphogenesis. When light intensity increases, plants can adjust by increasing their photosynthesis rate, producing more chlorophyll, and growing towards the light source (phototropism). Conversely, when light intensity decreases, plants may elongate their stems, change leaf orientation, or alter their flowering patterns to optimize their exposure to available light. These responses are regulated by light-sensitive proteins called photoreceptors, such as phytochromes and cryptochromes, which help the plant sense and interpret changes in light conditions.