The answer is false
(Apex)
Somalia is 233 miles northeast of Ethiopia - False;
Salalah, Oman is 385 miles northwest from Yemen - False;
The distance between the two East African nations of Somalia and Ethiopia is actually 0 miles. The reason for that is that these two countries share a border, thus there is no distance between their territories, apart from the imaginary line that is the border.
Salalah, Oman is 384 miles away from Yemen, but it is not toward the northwest, instead it is toward the northeast. Oman as whole is located on the northeast of Yemen, thus Yemen comes to located southwest of Oman.
Physical erosion and chemical erosion
I'm not sure its correct the two might be considered the same
Probably by what plants and animals can live in the area in turn changing how each place makes food, some may only have access to onions and garlic with maybe beef and goat while others have deer and pigs with parsley and bayleaf
