Explanation:
it's true it's the first Islamic Empire
Greek settlements allowed for easier contact with other civilizations.
Ancient Greece is made up of mountainous terrain that often separated its inhabitants making internal communication difficult. Greece is surrounded by seas, leading the ancient Greeks to become skilled seamen and assisting with the ability to interact and trade with neighboring regions for foods and goods.
I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
fall into three tiers.
Tier 1 words include basic or high-frequency vocabulary words and usually don’t include multiple meaning words.
Tier 2 words are less familiar to students but help in comprehending written texts and conversations shared between the teacher and student. Tier 2 words are “general academic words” and sometimes may be referred to as “rich vocabulary.” These words are precise but more subtle forms of familiar words and include multiple meaning words. For example, instead of saying “he walked,” one may say “he sauntered.” Tier 2 words cross over into a variety of domains or subject areas.
I think it is digital divide, Hope that was right
