Answer:
The top of the Grand Canyon is made up of Kaibab Limestone. Which contains marine fossils which indicate that it originated at the bottom of the sea.
Explanation:
The negatives of cultural encounters in East Africa can be observed in different periods of time with different new cultures coming in the region. For example, the cultural encounters with the Arab Empire of the Middle Ages, it brought a lot of violence because of the attempt to impose a new religion on the local population, and that was not accepted, so there was bloodshed, as well as slave trade, since the Arabs were seeing the locals as lower race that is only good for physical work.
Answer: 
Explanation:
The Tropic of Cancer is one of the parallels (imaginary line around the Earth parallel to the equator) located in the northern hemisphere (currently its latitude is 
).
It is called "Cancer" because a long time ago, when the summer solstice occurred in the northern hemisphere (on June 20th or 21st), the Sun was in the constellation Cancer (the crab).
Now, if we were just in the North Pole, Polaris would by exactly over our heads (
over the horizon), but as we go south and find the Tropic of Cancer parallel, Polaris altitude will be approximately at an angle of over the horizon.
Hence, the altitude of Polaris measured by an observer at the Tropic of Cancer is .
The correct answer is C) comprise several edge cities with independent business cores.
The modern urban areas have central city and multiple other edge cities around it, even though the central city is the biggest and most influential, all of the edge cities have separate business cores and all institutions needed for an urban area. They are in very close proximity to the central city and are well connected in every department.
