Which themes best represent Fortinbras as a foil for Hamlet? Select all that apply.

revenge

thought versus action

madness

noble behavior

A foil is a character that contrast some traits of the main character. Both Hamlet and Fortinbras lost their fathers, therefore their common trait is revenge. On the other hand, Hamlet is a scholar whereas Fortinbras is a soldier therefore their distinction trait is thought versus action.

Consequently, the answer is: revenge and thought versus action.