What was placed in the church to allow men to know where the British
were attacking from?

Lanterns

Explanation:

Paul Revere arranged a signal system using lanterns in the Old North Church to alert the local militias and citizens that the British are coming; one lantern if the British were coming by land and two lanterns if they were coming by sea.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.