How does walking your dog use energy from sunlight?

Sunlight is used during photosynthesis for plants to make energy. As we are not autotrophic, we need to acquire energy through plants, or animals that have obtained their energy through plants. When we eat, the glucose and other starches are broken down into monosaccharides, then stored until we need energy (such as walking the dog). When we use energy, the sugars are taken along with oxygen to convert it into energy. 

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.