How are visual aids used most effectively in a speech?

Read the excerpt from "save the redwoods."another, one of the finest in the grove, more than three hundred feet high, was skinned alive to a height of one hundred and sixteen feet from the ground and the bark sent to london to show how fine and big that calaveras tree was—as sensible a scheme as skinning our great men would be to prove their greatness. which  best  describes how the excerpt appeals to readers’ emotions? the excerpt provides facts about the tree, which impresses readers’ scientific minds. the excerpt describes how the tree traveled to london, which excites the readers’ sense of adventure. the excerpt compares the tree to a person, which makes readers feel sympathetic toward the tree. the excerpt explains how to skin a tree, which makes readers feel awed at the height of the tree.

The institute of international research is holding its annual convention. this year more than 500 scholars have been invited to hear research reports on many timely topics. approximately 250 big name scientists will be winging their way to washington, d. c. how can the underlined sentence be revised so that it fits the tone of the passage? a) approximately 250 people will be in washington, d. c. b) approximately 250 bigwigs will be flying to washington, d. c. c) approximately 250 science people will be going to washington, d. c. d) approximately 250 well-known scientists will be arriving in washington, d. c.

What is the message? how does langston hughes convey the message in this poem?