Which statement is true about chlorophyll?

Chlorophyll is a crucial component of the photosynthesis process in plants. It acts primarily as a pigment, allowing plants to absorb sunlight effectively. By capturing light energy, chlorophyll enables the conversion of carbon dioxide and water into glucose and oxygen, thus fueling the plant's growth and energy needs. This function underscores the importance of chlorophyll in allowing plants to thrive in various environments, both terrestrial and aquatic.

The other statements do not hold true in the context of chlorophyll's role. For instance, chlorophyll is essential for photosynthesis, contrary to the claim that it is unnecessary. Additionally, while chlorophyll plays a vital role in capturing light energy, it does not directly store energy; energy storage occurs in the form of carbohydrates produced during photosynthesis. Lastly, chlorophyll is not exclusive to aquatic plants; it is present in a wide variety of plant species, including terrestrial plants, further highlighting its pivotal role in the growth and functioning of the entire plant kingdom.