<span>The most unpredictable presentation aid a speaker could use is a person or an animal.
Presentation aids are things other than the expressions of a speech that are utilized to support the goal of the speaker. Specifically, they can be visual aids, sound aids or other supporting innovation.</span><span /><span>
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It's A. That's the best option. ^ω^
Local nobles started gaining power which led to the downfall of great empires like the roman empire. These nobles had a lot of land so they would give the land to vassals in exchange for protection and for resources. The states were smaller than before but the leaders were wealthy and powerful.
By 1830 independence had been won by Greece
It was important because it was only a few Spanish settlers that established plantations so they needed a labor force to work