Examine the legend in the Use by sector layer. In the western ...

[ssal]

Examine the legend in the Use by sector layer. In the western states, what
  sector makes up the largest piece of each pie? What will be an ideal response?

Question 2

If the total water use per capita is not all used for domestic purposes, what
  other ways might this water be used in your state? What will be an ideal response?

[JYan]

Answer to Question 1

Agriculture (green color in legend).

Answer to Question 2

Answers will vary. Most of the water used in Arizona, for example, is for irrigating crops,
mining, and generating power.

[ssal]

Great answer, keep it coming

[atrochim]

Wow, this really help