You are stranded in the desert. You should try to burn, you find a tank of methane (CH4). The correct option is D.
Burning is a chemical process that is done in the presence of oxygen. It is a process that produces heat and light. The burning of objects is done by fire. The substance that burns is called flammable, and that does not burn is called inflammable.
When you are in the desert, you are making a fire signal, but there is no wood, present, and you have chemicals in your bag. Many chemicals burn with a good flame. You can choose a chemical to make the signal.
Methane is a highly flammable chemical, that burns with a good flame. So methane can be used to make a burning signal in the desert.
Thus, the correct option is D. You find a tank of methane (CH4).
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