Answer:
Invention, is the method used for the discovery of arguments in Western rhetoric and comes from the Latin word, meaning "discovery". Inventio is the central, indispensable canon of rhetoric, and traditionally means a systematic search for arguments.
I’d say a song writer simply because more people listen to music as well as the fact that they need things that people can relate to or even just something or someone they know of in that song that’ll make the writers song more interesting and catchy
Don't start the car as you're connecting the cables.
The second, third, and fourth are correct.