Which of the following can improve the tone of a presentation by making it sound more professional?

I found this from https://www.market-inspector.co.uk/blog/2017/02/speaking-habits-to-help-you-sound-professional I  ( I need to cite my sources )

Always remember to stand or sit with your back straight! Your posture is the first thing the audience will notice. First impression always matter!

Maintain visual contact with the audience! This shows that you are connected with your audience.

Remember that your listeners deserve your full attention. No one likes to listen to an emotionless presentation where the person speaking doesn’t seem mentally present.

Not everyone has front seats! Remember to speak loudly and make sure everybody is able to hear you. However, do not start yelling.

Body language and gestures make every presentation more engaging and vivid! Therefore, use these to emphasize important points. If you don not feel like it comes natural to use body language, it is better not to use it too much.  

Make yourself understood! Use words that your audience will understand and make clear the points that you are presenting. Fancy words or expression may only create confusion. Avoid emphasizing yourself and instead make it about the cause you are there for.

Use pauses! They can help you emphasize key points and create suspense. Your listeners will stay engaged and will be able to remember more of your presentation as they will connect it with a certain move or a certain moment of silence.

You need to interact and respond to questions! There will always be questions. Therefore, you need to make it feel more like a conversation. The more questions you ask and explain, the more involved and professional you will look.

there is no texting, but on the homepage there are a bunch of questions you can answer along with the subjects so you can pick a specific one

hope this !

-payshence

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)