What do chlorophyll molecules primarily capture to help plants?

Chlorophyll molecules play a crucial role in the process of photosynthesis by primarily capturing light energy. This light energy, mostly in the blue and red wavelengths, is essential for converting carbon dioxide and water into glucose and oxygen. The energy captured by chlorophyll is then utilized to drive the series of biochemical reactions that occur during photosynthesis, specifically in the light-dependent reactions.

Since chlorophyll absorbs light energy, it maximizes the plant's ability to harness sunlight, which is vital for producing food and sustaining growth. This process ultimately enables the plant to convert light energy into chemical energy stored in glucose, which can be used for growth, development, and energy needs.

The other options do not accurately represent the primary function of chlorophyll. Sound energy is not a resource used by plants, nor do they rely on thermal energy for growth in this context. While chemical energy is relevant for respiration, it is a result of photosynthesis rather than something that chlorophyll directly captures.