What is the difference between plants, animals, mushrooms in terms of nutrition?

Plants are autotrophs, i.e., they themselves produce organic matter from inorganic (carbon dioxide and water) in the process of photosynthesis.
Animals and mushrooms are heterotrophs, i.e. they absorb ready-made organic substances along with food.

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.