Q: From observations as simple as blowing up a balloon, it is clear that increasing the amount of gas increases what else?


Read this paragraph and choose the correct option from the provided answers:

The combined gas law, , is true for a particular sample of gas. If any gas is added or allowed to leak out, however, the relationship is lost. In order to get a relationship that is true for any sample of gas, it is necessary to incorporate a term for the amount of gas. From observations as simple as blowing up a balloon, it is clear that increasing the amount of gas increases the volume.

 Choices:

- area

- every volume

- the shift

- the volume


A:
the volume