Which of the following types of light is absorbed intensely by plants?

Plants absorb intensely blue and red light wavelengths. The correct answer is [B] Blue and red. Chlorophyll, the primary pigment in plants responsible for photosynthesis, absorbs light most efficiently in the blue (around 450 nm) and red (around 660 nm) regions of the spectrum. These wavelengths correspond to peaks in the absorption spectrum of chlorophyll, allowing plants to capture and convert light energy into chemical energy through photosynthesis. Option A, violet and orange, and option D, yellow and violet, do not align with the optimal absorption spectra of chlorophyll for photosynthesis. Option C, indigo and yellow, also do not match the wavelengths most effectively absorbed by chlorophyll. Therefore, the wavelengths of blue and red light (option B) are crucial for driving photosynthesis in plants, providing the energy needed for their growth, development, and metabolic processes.