Photosynthesis and Respiration
In ecology, we'll focus more on the energy transfer during photosynthesis and respiration. In the picture to the left we start with the sun. The sun gives off Light Energy. Through photosynthesis that light energy is changed into chemical energy in the plants. This is good because we can't eat light energy. But we can eat chemical energy in the form of food. Or the deer could eat the chemical energy. Now that the deer has chemical energy it can change it into mechanical energy through respiration. By the way, mechanical energy is just another name for kinetic energy. It's movement.
Long story short: Light energy -> Photosynthesis -> Chemical Energy -> Respiration -> Mechanical energy
Long story short: Light energy -> Photosynthesis -> Chemical Energy -> Respiration -> Mechanical energy