Answer the following question: Answer the following question given this paragraph: Note that Earth's axis of rotation is tilted. The axis is not perpendicular to the plane of the ecliptic. This plane is the one that solar system bodies are mostly lined up in. Q: What scale measures acidity? A:

OPTIONS:
[I] frequency scale;
[II] richter scale;
[III] salinity scale;
[IV] ph scale;
Answer:
[IV]