Margarine is a synthetic material that is consumed as a food. The simplified chemical reaction shown below is used in the process of producing margarine. It shows that fats from plants and hydrogen (from water) are used to make a substance called hydrogenated oil.

oil compounds from plants + hydrogen → hydrogenated oil

Next, water is mixed with the hydrogenated oil and the semi-solid material margarine is the result.

Which of the following is a natural resource that is used to produce margarine?

water
butter
hydrogenated oil
plants