Answer:
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Both were powerful nations and they served as trading hubs in their respective regions during that time.
I believe the correct answer is that the <span>change in pH would destroy the herbivores present in the lake. Due to the increase in pH algae could not survive in the lakes so they find other places wherein they could reproduce therefore increasing the population of </span><span>periphytic algae.</span>
<span>False. Sound *reflects* from the surfaces in a room, it doesn't "refract." Refraction is a distortion from passing through something (like light through glass).</span>
