Concept:This analogy is based on the primary function or action linked with an object.
Explanation:A pen is mainly used to write.
So the relation is: object → action performed by it.
A sword is mainly used to fight.
War is a broader situation, steel is the material of a sword, and scabbard is its cover.
These do not match the direct action relationship as closely as fight does.
Therefore, 'Sword' is related to 'Fight' in the same way as 'Pen' is related to 'Write'.
Answer:C. Fight