Given the following diagram, what product is produced at location a? a)carbohydratesb)carbonic acidc)fossil fuelsd)limestone

Carbonic acid

Explanation: The carbon dioxide when get dissolved in the water is known as carbonic acid. This carbon dioxide from the water is used by the pytoplanktons to perform the process of photosynthesis.

This is a very weak acid which is formed when the carbon dioxide gets dissolved in the water. The carbon dioxide in the environment goes inside the  ocean that is used by the organisms and oxygen is released into the environment and inside water.