Concept:The Ark of the Covenant was the sacred chest that held the stone tablets of the Law.Explanation:The Bible teaches that inside the Ark were the two tablets of stone on which God wrote the Ten Commandments.Other sacred objects, such as manna and Aaron’s rod, were kept near or in front of the Ark, not as its main content.Therefore, the essential item placed inside the Ark was the two tablets of stone.Answer:B. two tablets of stone