Why did the ancient Egyptians worship Osiris very much?

Worship of Osiris is a common theme in ancient Egyptian religious dances. The worship of Osiris comes from the worship of nature, and nature first started from the worship of the Nile God. Because the Nile River floods regularly every year, which brings inconvenience to the life of ancient Egyptians, people have religious behaviors of worshipping the river god, and annual activities of offering sacrifices to the river god are held. Later, Osiris became a god representing plant growth and human reproduction, and later evolved into a hell judge who dominated human life and death.