Question

apply something to something
1. Lit. to put something onto the surface of something.
  Apply the decal to the surface of the glass.
  Apply the paint evenly to each surface.
2. Fig. to use something, such as force, effort, etc., on something or in the performance of some task.
  Apply more effort in your school work.
  An even greater effort has been applied to make sure we finish on time.