Which nonverbal strategy can I use to emphasize key points? Gestures, volume, pace, tone

You can use gestures to emphasize key points. Volume and tone both include verbal  so it isn't those, and then pace is how fast you move which usually doesn't affect key points.

the author is showing that it is the insatisfaction of basic needs that brings about the protests such as the strikes.if workers do not earn enough to buy food and feed their families and themselves in order to continue working, what is the use of working? besides, another message from the author is that of the owners of factories should be worried about ensuring their furure by having a second and third generation of workers in their industries.if they do not hear the workers demands, they will not have any more workers to make their pockets full.

answer; /// i do believe the correct answer is (c) public education;