Final answer:
Gargoyles and demons on Cathedrals primarily served to ward off evil spirits and to disperse rainwater away from the building, alongside symbolically encouraging religious adherence and showcasing impressive Gothic architectural skills. The correct option is a.
Step-by-step explanation:
The gargoyles and demons on Cathedrals serve multiple purposes, but most notably, they were used to ward off evil spirits. These grotesque figures, which include famous chimeras and gargoyles designed as waterspouts, symbolized evil and served as a deterrent to remind people to adhere to religious morals.
Not only did they serve a spiritual and religious function, but gargoyles also had a practical architectural role, being first designed in the 13th century to disperse water from the roofs, protecting the foundations of the buildings. Additionally, these features showcased the architectural skills of the builders during the Gothic period.
Over time, Gothic architecture, with its characteristic flying buttresses and large stained-glass windows, created spaces where architecture and religious teachings intertwined, educating the illiterate and reinforcing the power of the church. The correct option is a.