What is the role of chlorophyll in plants?

Chlorophyll plays a crucial role in the process of photosynthesis, primarily by absorbing light energy. This green pigment found in plant leaves captures sunlight, which is essential for converting carbon dioxide and water into glucose and oxygen. The light energy absorbed by chlorophyll enables the plant to produce its own food and is vital for its growth and energy supply.

In contrast, the other options focus on different functions that are not directly related to chlorophyll's primary role. Water uptake is facilitated by root cells and their structure rather than chlorophyll. Carbohydrate storage takes place in various plant tissues, particularly in roots and stems, but is not a function of chlorophyll itself. Nutrient transport is managed by systems like xylem and phloem, which are specialized for moving water and nutrients throughout the plant. Thus, chlorophyll's main and critical function remains its ability to absorb light energy for photosynthesis.