Answer:
Energy flow occurs by means of the food chain and the food web. Throughout this procedure, plants in the ecosystem, soak up solar energy (aka sunlight) through what we call chloroplasts. During this process, part of it is turned into chemical energy in the process of photosynthesis.
Definitions:
A chloroplast is an organelle within the cells of plants where photosynthesis occurs. This process in broad terms, is where solar energy is transformed into chemical energy.
The process of Photosynthesis is where plants convert solar energy, water, and carbon dioxide to produce "food" and oxygen in the form of sugar.
6CO2 + 6H2O → C6H12O6 + 6O2.
Hope this helps!