Your question: Which of the following is not one of the five pillars of Islam..?
Your answer: Living in Mecca is not a pillar where as praying while facing Mecca is not also a pillar. There are 5 pillars of Islam: Shahadah, Sawm, Salah, Zakat and Hajj.
During the Gilded Age, when factory workers were injured at work, they didn't receive anything. Their families would often starve to death, because they weren't making money to buy food.
