Photosynthesis!
adaptation and evolution
Almost all the energy used by living things comes from the Sun, through the process of photosynthesis. Plants capture sunlight and convert it into chemical energy in the form of glucose, which is then consumed by other organisms, transferring the energy up the food chain.
All living things depend on energy from the sun. Even though animals get their energy from either plants or from animals that eat plants, those plants get their energy from the sun, so it all comes back to the sun.
The sun.
Land-dwelling living creatures primarily depend on the sun as the initial source of energy through photosynthesis. Plants convert sunlight into chemical energy through photosynthesis, which is then consumed by animals for energy.
All living organisms, that are catagorized as consumers, depend on eating other organisms for energy, although, producers create their own energy from the abiotic features of an ecosystem.
The Sun
The Sun
-- All depend on heat. -- Most depend on light. -- Those in specialized occupations, such as microwave engineers, radio announcers, and tanning salon proprietors, depend on other bands of EM.
Plants
Living things get energy from food during digestion. This is an exothermic reaction in which heat and electrons are released and used as energy.
Energy from the sun makes earth warm enough to support life and growth