The most common example is plants, which use photosynthesis to convert sunlight, water, and carbon dioxide into glucose (sugar) for energy.
Some bacteria are also autotrophs, using different processes like chemosynthesis to obtain energy from inorganic compounds.
Here are some examples of autotrophs:
* Plants (trees, flowers, grasses, ferns)
* Algae (seaweed, phytoplankton)
* Cyanobacteria (blue-green algae)
* Chemosynthetic bacteria (found in deep sea vents, hot springs)
Let me know if you'd like to know more about the processes these organisms use to make their own food!