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
Sentence 1 is the topic sentence. other sentences are based on 1 to support sentence 1, elaborating the topic sentence.
An example of a marvel of nature is when a caterpiller turns into a butterfly