5. Beginning with the emperors of the imperial period made full use of portrait
sculpture's potential as a tool for communicating specific ideologies to the Roman people.
A. Marcus Aurelius
B. Augustus
C. Vespasian
D. Julius Caesar

Beginning with Emperor Augustus, the potential of portrait sculpture as a tool to communicate with the Roman people was harnessed.

Augustus (63 BC-AD 14) was a politician of the ancient Roman Empire who was noted for holding the position of Roman emperor. His government began in the year 27 BC and lasted until his death in the year 14 AC.

One of the highlights of Augustus' rule was that he adopted his portrait sculpture and spread it throughout the empire. This was used as a tool to communicate important messages to the citizens of Rome.

This tradition is also noted for taking aspects of the Hellenistic style and combining them with Roman aspects. On the other hand, they highlighted some physical characteristics of Augustus (and other emperors) such as:

This tradition transcended several imperial reigns from the reign of Constantine the Great.

Learn more about Augustus in: link

lines and shapes are a part of the visual elements which can be played with and used to create a mood or feeling in a composition.

some of the other elements include the pattern, color, tone and texture. all these elements serve together as the construction blocks which are used by the artists to create artwork.

lines are used to form drawings and different shapes are formed when these lines are used in certain lengths or angles. so the artist can play with these elements of art to create and express different moods, thus conveying different  meanings.

the answer of "what has three legs but never walks" is a yard stick. this answer can be found at