A good way to answer this would be to think about what the major sinks of each resource are. For example phosphorus is mainly pooled in rocks and is released when rocks are weathered and then cycles with the death and decay of plants (etc.) that take it up.
It doesn't occur like this for the nitrogen and carbon cycles - what are their major sinks?
I've attached a pdf which outlines the cycles pretty well :)
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A. combustion
because carbon dioxide is the main product of burning carbon based fuels and combustion is the process of burning something
The correct answer is condensation
That is because energy is used to break bonds, so condensation where bonds are made actually loses energy because it turns into liquid.
It means the system absorbs energy from surrounding objects; usually, but not always, involving heat
