The main purpose of Patrick Henry 's speech at Virginia Conference, was to convince the delegates to secede from Britain; moreover, to fight back against them. He antagonizes Britain by imputing every hardships they faced to Britain.
So basicly it was to persuade the reader
Hoped this helped
No, you only have to write 1 just reflect on what you learned or whatever the topic is
Metaphor: because there is a comparison between the treasures spread on the ground and the evil seed of Adam drifting from the shoreline