The African countries can easily be described and generalized, in the sense of the whole continent, as the economies are predominantly dependent on one or two products.
That dependence on one or two products is making very big problems, and it is also a very big mistake of the governments. When there's a slight variation in the prices on the certain product, the economies are heavily influenced, often in a bed manner.
It is weird though that the African countries have orientated their economies in this way, especially because the continent is very rich in lots of natural resources.
This is known as the visible spectrum of electromagnetic radiation, or visible light. This is the frequency of light that we see, and which illuminates our world as it reflects off of objects. Compared to the full spectrum of electromagnetic radiation, the visible light portion is actually quite small.
Answer:
1000 kilometers
Explanation:
The Khyber Pass: The chief mountain pass between Pakistan and Afghanistan, west of Peshawar. 33 miles (53 kilometers) long; 6,825 feet (2,080 meters) high.
The Bolan Pass: The pass is an 89-km (55-mi) stretch of the Bolan River valley from Rindli in the south to Darwāza near Kolpur in the north. It is made up of a number of narrow gorges and stretches.
Because many rivers run swiftly down int mountains.
Hope that helps