What role does chlorophyll play in plants?

Chlorophyll plays a crucial role in plants by capturing sunlight for the process of photosynthesis. This pigment, primarily found in the chloroplasts of plant cells, absorbs light energy, most effectively in the blue and red wavelengths. This energy is then used to convert carbon dioxide and water into glucose and oxygen, which are essential for the plant's growth and energy production. Thus, without chlorophyll, plants would not be able to utilize sunlight effectively, ultimately impacting their ability to produce food and sustain life.

The other options don’t accurately describe the primary role of chlorophyll, as it does not provide structural support, assist in nutrient transportation, or directly protect against pests. Each of these functions is accomplished by different structures or processes within the plant.