The cell wall is the part of the cell whose purpose is to provide structural support to the cell. This is located outside the cell membrane. This part can be flexible or rigid. The purpose of cell wall acts like that of the skin of the human body. answer hence is C.
Fossil fuels represent carbon storage areas. Carbon that is locked in these fossil fuels does not cycle through the Earth. When humans burn fossil fuels, the stored carbon is released into the atmosphere as carbon dioxide. The carbon is then free to cycle through the Earth and can upset the natural balance of the carbon available, changing the way that processes occur on Earth.
<span>
</span>