Final answer:
During photosynthesis, autotrophic organisms like plants and algae produce sugars/carbohydrates and oxygen, with ATP as an energy source for cellular functions.
Step-by-step explanation:
Autotrophic organisms, such as plants, algae, and certain bacteria, produce sugars/carbohydrates and oxygen during the process of photosynthesis. In this process, chlorophyll within the cells absorbs sunlight, which is used to convert water and carbon dioxide into sugars, primarily in the form of glucose, and oxygen as a byproduct. The sugars provide necessary energy in the form of ATP which powers various cellular activities. While oxygen is released into the atmosphere, which is vital for the survival of aerobic organisms on Earth.