How do solid carbon compounds change to carbon dioxide in the atmosphere during the carbon cycle? a. cellular respiration by living things
b. photosynthesis by photoautotrophs
c. decomposition of dead organisms
d. two of the above

When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground. Some is buried and will become fossil fuels in millions and millions of years. Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere.

Explanation:

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if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.