What is the role of carbon dioxide in plant health?

Carbon dioxide plays a crucial role in plant health through its essential function in the process of photosynthesis. During photosynthesis, plants capture carbon dioxide from the atmosphere and, using sunlight and water, convert it into glucose and oxygen. Glucose is vital as it serves as an energy source for plants, enabling them to grow and carry out various metabolic functions. The oxygen produced during this process is also beneficial for other organisms, including humans, as it contributes to the atmosphere's overall oxygen supply.

While other options mention important aspects related to plants, they do not directly connect to the key role that carbon dioxide plays in overall plant health through photosynthesis. Understanding this process highlights how crucial carbon dioxide is in supporting a plant's energy needs and its ability to thrive.