Carbonate groups contain a single carbon atom, and three oxygen atoms in a trigonal molecular geometry. The carbon atom has two single bonds to two oxygen atoms and a double bond to the third oxygen atom. Therefore, in addition to carbon, carbonate minerals contain oxygen. An example of a carbonate mineral is calcium carbonate, often found within rocks.
If there where a decrease in the number of decomposers there would be a increase in the number of producers and consumers.
Explanation: if there is too much the things the bears eat die quicker and then when they die the bears will start dyeing and if there is too little bears the thing bears eat will rise
Photosynthesis uses carbon dioxide and water in the presence of sunlight to produce glucose and oxygen.
However,
Respiration uses carbon dioxide and glucose to power activities of the cell.
I hope this diagram helps