Final answer:
Autotrophs are the form of life required to sustain all other forms of life. They produce their own food through photosynthesis and provide energy for other organisms in the food chain.
Step-by-step explanation:
Autotrophs are the form of life that are required to sustain all other forms of life. Autotrophs, such as plants, produce their own food through photosynthesis, capturing energy from the sun and converting it into chemical energy. This energy is then transferred to other organisms through the food chain. Without autotrophs, there would be no energy available for other organisms to survive and continue the cycle of life.
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