Final answer:
Liturgy can be described as thankful work undertaken in response to God's adoption of us. It is a form of worship and service to God, expressing gratitude for His acceptance of us.
Step-by-step explanation:
According to the information provided, liturgy can be described as work that is thankfully undertaken in response to God's adoption of us. This means that liturgy is a form of worship and service to God, expressing gratitude for His acceptance of us. Liturgy is often carried out in a formal and ritualistic manner, involving prayers, hymns, and sacraments.
An example of liturgy is the Divine Liturgy in the Eastern Orthodox Church, where the Eucharist is celebrated as a central act of worship. During the Divine Liturgy, the bread and wine are believed to transform into the body and blood of Christ, symbolizing His incarnation and sacrifice.