The countries in the Horn of Africa are Djibouti, Eritrea, Ethiopia and Somalia. The smallest country in the Horn of Africa is Djibouti, whose capital shares the same name as the country (Djibouti). The Horn of Africa covers the part of Africa that is the most eastern part of the continent and Djibouti lies not far from the Arabian Peninsula, with only a little bit of waterway (the sea) dividing it from Yemen. Djibouti is a multi-ethnic country with Arab and French being the two main languages.
A. a new dwarf planet because dwarf planets are round
Answer: B. Original Continuity
Explanation:
Original continuity is the concept that sediments are deposited horizontally at the original point of formation. This lateral deposit continues, layer by layer unless the sediments are interrupted by a barrier.
The two rocks on the opposite sides of the canyon were likely one body of rock due to their similar lithology and fossil content. It is likely that the canyon formed due to erosion over time, thereby creating a barrier between the rocks.
https://study.com/academy/lesson/how-geography-isolated-ancient-china.html
That video will explain everything. I have already learned this in school, and it is very important on the test. VERY IMPORTANT.