Which of the following discribe a solution

Think of a glass of warm water and a spoonful of salt. Once the salt is mixed into the warm water it will dissolve and become a homogeneous solution. If the glass of water is then put into a pot on the stove the water can be boiled away (in the form of steam) and a visible layer of salt will remain in the pot.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

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