How can we determine the main idea in a piece of writing? What are some things to look for when determining the main idea?

I'll mark what are some examples of metaphors in the song "lose yourself" by eminem?

Read the passage from an argumentative essay. many endangered species are currently threatened by climate change. there are some laws already in place, but are they effective enough? anyone with a conscience knows that these creatures deserve the chance to survive without outside threats impeding their survival. i suppose this is a tough decision for lawmakers, but i hope they choose wisely. which statement best evaluates the claim in the passage?

How do the soldiers' feelings about macbeth in act i differ from their laterfeelings about him in act v? a. in act i, theymere jealous of his rise to power; in act v, they feelsorry for him and the burdens he bears. b. in act i, they think he is a bully; in act v, they believe he will make agood king if given enough time to rule. c. in act i, they think he is brave and honorable; in act v, they think heis an insane tyrant who must be defeated. d. in act i, they are frightened of his fierceness; in act v, they areafraid of what horrible crimes he will commit next.