Where do all carbon molecules come from?

Answer 1

during photosynthesis green plants prepare their own food in the presence of sunlight and chlorophyll with the help of water vapor and carbon dioxide from from atmosphere and form carbohydrates as their food

Answer 2

Carbon molecules primarily come from two main sources: inorganic sources, like carbon dioxide (CO2) in the atmosphere, and organic sources, like living organisms and decaying organic matter. Through processes like photosynthesis, carbon is converted from CO2 into organic molecules by plants, and then transferred through the food chain to other organisms. Carbon is constantly cycled through the environment through various biogeochemical processes.