Generally speaking, it would be "researching" that is a skill that would contribute to someone s academic identity, since research can lead to massively important truths about the topic in question being revealed.
Answer:
They needed to look strong enough to work so they would not be killed.
Explanation:
Those sick or too old automatically were taken to these gas chambers, and yes it is how it sounds. A gas chamber was a sealed room that was used for execution by poisonous gas. Some mothers used to pinch their children's cheeks to make sure they looked extra healthy. A horrifying way to die.
