Answer:
By dying on the cross, Jesus fulfilled the Old Testament prophecies of a coming messiah who would make a once-for-all-time sacrifice to atone for the sins of mankind. This sacrifice would make the need for further animal sacrifices obsolete, as Jesus' sacrifice was sufficient to pay for all of humanity's sins. As a result, the temple and its ritual sacrifices were rendered obsolete, and Jesus became the ultimate and perfect sacrifice for all of humanity's sins.