Final answer:
The shape of the advent wreath symbolizes eternity and the everlasting life found in Christ.
Step-by-step explanation:
The shape of the advent wreath symbolizes several concepts in Christianity.
First, the circular shape of the wreath represents eternity and the endless love of God. It has no beginning or end, just like God's love and the hope of eternal life.
Second, the wreath is typically made of evergreen branches, which symbolize the everlasting life found in Christ. The greenery also represents the hope and renewal that comes with the birth of Jesus.