C. The increase in average global temperatures caused by greenhouse gases
Answer:
Oxygen is a colourless, odourless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the oxygen to the atmosphere.
The organelle that acts like the brain or the control center in the cell in the nucleus.
Hope this helps!!! :D
