What elements are the cell wall made of

Hello!

If you are talking about a plant cell wall, then  plant cell walls are mainly made up of cellulose. Cellulose is a long fiber polymer containing hundreds of glucose molecules.

Meanwhile, animals do not have a cell wall, so their cell wall is not made up of anything. The cell wall provides structure, support, and protecting for the cell, but apparently, it is said that animal cells do not have cell walls, meaning they do need the structure, support, and protection from the cell wall.

Hope this helps, have an awesome day/night! :)

phospholipids, glycolipids, and sterols

Explanation:

The cell wall is made up of three classes of amphipathic lipids: phospholipids, glycolipids, and sterols. The amount of each depends on the type of cell, but in most cases phospholipids are the most abundant, often contributing for over 50% of all lipids in plasma wall.

it's c. (to reduce the greenhouse effect/carbon gasses)