The spark to set off war 1 was the assassination of archduke franz ferdinand of what european nation?

it further strained relations between the north and the south and convinced

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.