Which sources would provide the most relevant and credible evidence in this excerpt from a speech?
The Earth's Giant Sewer

Global warming is the rise in the earth’s surface temperature that has been happening since the mid-1900s.(Physiologist, scientists, Historians) believe that greenhouse gases are to blame. A study conducted by(Caltech University, The boys scouts of America, The youth empowerment Fund) showed that greenhouse gases trap heat in the earth’s atmosphere. The heat warms the air and eventually, the oceans and the ground.

Published in 1849, by was inspired by the writer's experience of being arrested when he refused to pay a $1 poll tax as a protest against the mexican-american war.

Read the excerpts from the land. [willie] turned to my daddy. "it's my boy mitchell done this, mister edward, and i know there ain't no way t' make it up t' ya if this here horse don't heal right, but i jus' 'bout t' put a strap t' mitchell my own self 'bout what he done. i'm gonna put a strap t' him right now, matter of fact! " with that said, he positioned his whip and turned toward mitchell. *** my daddy stopped and looked at me. "no," he said. "i'm not going to whip you, paul. no, your punishment is that you'll never get to ride ghost wind again. i figure you'll remember that a whole lot longer than a whipping. you won't ride any of the other horses either, including the appaloosa, until i say so." which statement about willie’s and mister edward’s reactions is true? both men believe that their sons should be held accountable for their behavior. both men believe that their sons need to learn to handle horses properly. both men believe that their sons will likely harm the horses if they ride them. both men believe that their sons have permanently injured ghost wind

The words screaming and rushed in the passage suggest which tone in the story the metamorphosis a.) tense b.) positive c.) fun d.) formal