B. What element does decomposition release from deceased organisms?
Where do decomposers release this element back into?

Decomposition is the process by which dead organic substances are broken down into simpler organic matter such as carbon dioxide , water and mineral salt

The greenhouse effect is the production of harmful gases that harm the atmosphere.

Humans can reduce the level of greenhouse gases by opting for alternate technologies or reducing their carbon emissions.

Explanation:

The greenhouse effect is the process of heating the earth's atmosphere by trapping the Sun's energy, thereby making the atmosphere hot. This natural process of trapping the heat is caused by numerous gases like methane, carbon dioxide, water vapor, and other gases. It's from this process that the atmosphere produces bad gases that damage the earth.

The reduction of the effect can be reduced by humans if they reduce their consumption of resources or energy. Moreover, shifting to alternate technologies that use lesser or no gasoline will also help in the reduction of greenhouse gases.