Autotrophs are able to independently create all the organic substances they need to build cells and vital processes from inorganic substances – water, carbon dioxide and others. They receive energy for such complex transformations either due to sunlight and are called phototrophs, or due to the energy of chemical transformations of mineral compounds, and in this case are called chemotrophs.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.