What does etymology study?

Can someone me with this english question

Read this excerpt from patrick henry's speech ''give me liberty or give me death.'' what is the main idea of the text

Asap select 4 statements which could be considered a "theme" of a story, play, poem, etc. a sometimes the most profound ideas can come from unfamiliar places. b my best friend jeffrey has many unusual interests. c once a man gives his soul over to evil, he can never go back. d the three sheepdogs lay around the yard all day. e a priest's collar has an unusual effect upon people. f innocence is a powerful force in a world full of corruption. g king lear is a play shakespeare wrote later. h evil often wears the disguise of innocence. the answer is a c f h