1. Full of or characterized by animation, vigor, or courage: a spirited debate. 2. Having a specified mood or nature. Used in combination: high-spirited; low-spirited.
One product of photosynthesis is glucose (sugar), which provides the basis for most food chains. The second product of photosynthesis is oxygen which comes in handy if your happen to be an aerobic organism that requires oxygen for survival.
Photosynthesis is the process by which plants create energy in the form of glucose from carbon dioxide, water, and sunlight. The chemical reaction also produces oxygen, which is released back into the atmosphere. Plants get carbon dioxide from the air, water through their roots, and energy from sunlight.