1. Chemical Energy: This is energy stored within the bonds of molecules. Living organisms obtain chemical energy by breaking down food molecules (such as carbohydrates, fats, and proteins) through processes like cellular respiration. This energy is then used to fuel various biological processes, like growth, movement, and maintenance.

2. Light Energy: This is energy from the sun. Photosynthetic organisms, such as plants and algae, capture light energy and convert it into chemical energy through photosynthesis. This chemical energy is stored in the form of glucose, which serves as a primary energy source for other organisms in the food chain.

These two forms of energy are interconnected. Light energy powers photosynthesis, which produces the chemical energy that fuels most living organisms.