HELP PL

Excerpt from Understanding Speed and Sound
Marie Devers

Did you ever think about what sound is made of? Did you know that sounds move at a certain speed? Learning about sonic booms can help you appreciate just how rapidly sound can travel. To understand the term sonic boom, you must first examine some scientific notions. You should realize that everything is composed of molecules. Even air—which may seem like nothing—is made up of molecules. Sound acts like a wave that shoves these molecules around. Some air molecules compress, or move close together, while others spread apart. As molecules move, they force other molecules to relocate. This movement allows sound to travel through the resulting empty space. The speed of sound is the rate at which sound travels through this space.
Which is the topic sentence of paragraph 1?

A) You should realize that everything is composed of molecules.
B) This movement allows sound to travel through the resulting empty space.
C) The speed of sound is the rate at which sound travels through this space.
D) Learning about sonic booms can help you appreciate just how rapidly sound can travel.

Chicago by carl sandburg hog butcher for the world, tool maker, stacker of wheat, player with railroads and the nation's freight handler; stormy, husky, brawling, city of the big shoulders: they tell me you are wicked and i believe them, for i have seen your painted women under the gas lamps luring the farm boys. and they tell me you are crooked and i yes, it is true i have seen the gunman kill and go free to kill again. and they tell me you are brutal and my reply is: on the faces of women and children i have seen the marks of wanton hunger. and having answered so i turn once more to those who sneer at this my city, and i give them back the sneer and say to them: come and show me another city with lifted head singing so proud to be alive and coarse and strong and cunning. flinging magnetic curses amid the toil of piling job on job, here is a tall bold slugger set vivid against the little soft cities; fierce as a dog with tongue lapping for action, cunning as a savage pitted against the wilderness, bareheaded, shoveling, wrecking, planning, building, breaking, rebuilding, under the smoke, dust all over his mouth, laughing with white teeth, under the terrible burden of destiny laughing as a young man laughs, laughing even as an ignorant fighter laughs who has never lost a battle, bragging and laughing that under his wrist is the pulse. and under his ribs the heart of the people, laughing! laughing the stormy, husky, brawling laughter of youth, half-naked, sweating, proud to be hog butcher, tool maker, stacker of wheat, player with railroads and freight handler to the nation. which type of figurative language does the poet use most often in "chicago"? a. rhyme b. simile c. metaphor d. personification

I’n a rough draft, where should the main idea first appear in the paper

My dog sleeps beside my bed he wakes me up in the middle of the night to let him out. complete, run-on sentence or comma splice