Final answer:
The purposes of a hierarchy of spaces in a Christian church include facilitating different activities and functions, symbolizing different degrees of sacredness, and providing spaces for private prayer and devotions.
Step-by-step explanation:
The purposes of a hierarchy of spaces in a Christian church are multifaceted. Firstly, the hierarchy of spaces allows for different activities and functions to be carried out within the church. For example, the main sanctuary or nave is the central space where congregational worship takes place, while the altar area or chancel is where the Eucharist or communion is celebrated. Additionally, different levels of the hierarchy may symbolize different degrees of sacredness or access to the divine. For instance, the apse or sanctuary may be considered the most holy area of the church, while side chapels or transepts may provide spaces for private prayer or devotions.