Final answer:
Trevor attends Advent, Anglican, and Brethren churches.
Step-by-step explanation:
The three types of churches Trevor attends are Advent, Anglican, and Brethren. These types of churches fall under the broader category of Christianity.
Advent churches focus on the anticipation and preparation for the coming of Jesus Christ.
Anglican churches are part of the Anglican Communion, which is a global community of churches with roots in the Church of England. Brethren churches emphasize the importance of community and fellowship among believers.