The delivery of a speech helps the audience understand the topic, what you're talking about, and keeps the speech on track.
For example, if you were giving a speech on Romeo and Juliet, you wouldn't want to get off topic by giving information about Shakespeare's life instead of information and analysis of the play.
Red is the adjective because it describes the color of the truck.
Platoon means a group of people or things that work together under a leader.
Examples can be:
A platoon of soldiers, which has ~16 - 50 soldiers
A platoon of tanks, which has ~4 - 9 tanks
etc.
hope this helps
