Q: You are presented with the quiz "What is the result of imperfect passing of heat through a metal, on that metal?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when metal conducts heat , that metal expands" and "conduction is the passing of heat through a medium". So, what's the best answer to the question?

Available options:
A). contamination.
B). expansion.
C). sweating.
D). Energy..
E). forces.
F). burning.
G). Evaporation.
H). electricity.
The answer is:
B).