Pls I need help these are my last points!

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

How does a hydroelectric power plant converts energy into energy.

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.