Answer:
The correct answers are:
- Cleisthenes established the basis for Athenian democracy.
- Caesar Augustus kept the Senate in place after he "restored the republic."
- Extensive open plains are not a prominent feature of Greece's topography.
- A building designed to express ideals of reason, moderation, symmetry, and balance; but in reality it mostly showed off wealth and power of Athens is a Greek temple, such as the Parthenon.
- Ostracism was a tactic used in Athens to remove leaders who had lost the people's confidence.
Note: Olympiakos is the name of a Greek football club and has no relevance to the question. Pisistratus and Hippias were both ancient Athenian tyrants, but they did not establish the basis for Athenian democracy.