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.

[EX Q]: Fact: as distance from a source of light increases , that source of light will appear dimmer
[EX A]: The further a ship sails away from a light house?

[EX Q]: Fact: the sun is a source of light called sunlight
[EX A]: Sunlight is a source of light from what?

[EX Q]: Fact: the breaking down of food into simple substances occurs in the digestive system
[EX A]:
In a system of a body, this thing is broken down into smaller pieces to be effectively used:?