What is the fundamental difference in the nutrition of plants and animals?

By the way of nutrition, plants are autotrophs, and animals are heterotrophs. What is the difference between these concepts?
Autotrophs are organisms that prepare organic substances for themselves from inorganic ones. Plants, using the energy of the sun, from water and carbon dioxide, synthesize organic substances in cells with chlorophyll. This process is called photosynthesis.
Heterotrophs use the energy of ready-made organic substances, getting them together with food. In this case, energy is transferred from organism to organism through food chains.