What were male citizens of ancient Athens expected to do? to actively take part in the Assembly
to pay a small fee to vote in the Assembly
to join the army for three years
to serve on a jury for members of the same class

The answer is to actively take part in the Assembly

Explanation:

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.