As with most locations for settlements in any civilization the key factor is settlements were located in the lowlands where the land was fertile and could be farmed. Geography is very important when a site is picked for settlement. The site must be able to support human activity.
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In the 1950s, advertising executive, Rosser Reeves, invented the Unique Selling Point (USP). With this tactic, advertisers would create a phrase that summed up their product and then repeat it across all media. Thus, solidifying their product in the minds of consumers.
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I couldn’t answer your other question on who did the advertising.
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The Portuguese sailors were one of the first people to explore west Africa.
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