According to the constitution, when can a writ of habeas corpus be taken away?

Only if the public safety is in jeopardy

a. factors that are used to make goods and services

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.