Candace lives in a sunny valley. What would her best choice for alternative energy be?

The best choice for alternative energy for Candace would be solar energy.

Since Candace lives in a sunny valley, that means that the area has a lot of sunny days throughout the year. The Sun is an excellent choice for alternative source of energy in this kind of places because it will produce energy almost all the time (when it is day). Also, the amount of energy that the solar panels produce from the solar radiation is on a very solid level. It is a renewable source of energy too, thus environment friendly one, and it is a source that is not spending as it is constantly present. So all in all, Candace has a very good energy source for free, that will provide energy almost all the time (when it is day).