Final answer:
The Pantheon is a circular building with a single row of columns surrounding a central structure or courtyard. It was built in Rome in 125 CE using unreinforced concrete and features an oculus at the top of its dome.
Step-by-step explanation:
The correct answer is c) Pantheon.
The Pantheon is a circular building with a single row of columns surrounding a central structure or courtyard. It is located in Rome and was built in 125 CE. The Pantheon's basic design includes a portico with free-standing columns attached to a domed rotunda.
The dome of the Pantheon is made with unreinforced concrete and features an oculus, which is a round or elliptical opening at the top that allows light into the building. The Pantheon is considered an architectural wonder and one of the most imitated buildings in history.