The correct answer to this open question is the following.
Although you forgot to include the speech, we can say the following.
Based on what you know about Pericles and how this speech was recorded, one strength of this document as a source about Athens's political system is the call that Pericles made to all Athenians to continue to defend its land, the basis of democracy, and to support the war effort in a Patriotic way to maintain the liberty of Athens.
During his public speech, Pericles honored the soldiers that were killed in the Peloponnesians War against Sparta, another city-state in ancient Greece. After 27 years of war, the fierce warriors of Sparta defeated the Athenian troops.
