How do autotrophs use energy from light ?

most autotrophs use photosynthesis to make their own food. in photosynthesis autotrophs use energy from the sun to convert water from the soil and carbon dioxide from the air into a nutrient called glucose..The glucose is a type of sugar.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs