Which of the following were the causes of the Peloponnesus war? So what the three correct answers.

The three correct answers for the causes of the Peloponnesian War are:

1. Spartans' fear of Athenian power and influence: Sparta, a city-state in ancient Greece, became increasingly concerned about the growing power and influence of Athens. Athens had formed the Delian League, an alliance of Greek city-states, which provided Athens with economic and military control over its member states. This worried Sparta and other Peloponnesian city-states, as they viewed Athens as a threat to their own autonomy.

2. Athenian imperialism and expansion: Athens, under the leadership of Pericles, pursued an aggressive imperialistic policy which involved expanding its influence and control over other city-states. Athens used its navy, which was the most powerful in Greece at the time, to enforce its dominance and extract tribute from other city-states. This expansionism was seen as a threat by Sparta and its allies.

3. The Megarian Decree: The Megarian Decree was an economic sanction imposed by Athens on the city-state of Megara, which was a close ally of Sparta. The decree banned Megarian trade in the Athenian Empire, thereby severely damaging Megara's economy. This act by Athens further strained the already tense relations between Sparta and Athens, leading to an escalation of hostilities and eventually the outbreak of war.