Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: wood is an electrical energy insulator
if a bad wiring affected a living room floor, which of these would be safest to climb?

Fact: melting means changing from a solid into a liquid by adding heat energy
Dropping butter into a boiling water would cause it to?

Fact: an exothermic reaction increases the amount of heat

A person puts a potato in some embers on the edge of a campfire and the potato gets hot. The embers are?