Which book of the Old Testament contains the story of Joseph?

The story of Joseph is found in the Book of Genesis, specifically in chapters 37 through 50. This narrative details Joseph's early life, his adventures in Egypt after being sold into slavery by his brothers, his rise to power, and ultimately the reconciliation with his family during a time of famine. Genesis serves as the foundational text of the Old Testament, covering creation, the patriarchs, and the beginnings of the Israelite people.

The other options do not contain the story of Joseph. Exodus follows the story of Genesis and focuses on the Israelites' enslavement in Egypt and their subsequent liberation. Leviticus primarily deals with laws and rituals concerning worship and the priesthood, while Nahum is a prophetic book about the destruction of Nineveh. Hence, Genesis is the only book among the choices that includes the life and story of Joseph.