Question: Start a fire using a magnifying glass.

  Options: 
 A. Tilt the magnifying glass in such a way as to focus the light from the sun to a single point on a leaf until it begins to heat up and smoke. Blow on the leaf until it combusts.
 B. Tilt the magnifying glass in such a way as to focus the light from the moon to a single point on a leaf until it begins to heat up and smoke. Blow on the leaf until it combusts.
Answer: A