Answer:
B) The surface layer of permafrost thaws in summer.
Explanation:
Permafrost is frozen ground or frozen soil. It is a landform in which the ground remains frozen for over a long period of time usually more than two years. Permafrosts are usually found in high latitude regions. For a permafrost to form, the temperature must remain considerably below freezing point.
The surface layer of a permafrost is bounded by the permafrost table and below it lies the active layer. During summer when temperature rises above freezing point, this layer thaws. In winter times, the surface layer remains frozen.
The West of the United States has been one of the most important settlements in the colonial America due to its productive industries of cattle ranching and mining. In addition, the territory was coined the "Wild West" because this American Frontier had a rich history of folklore concerning gangs and outlaws.
Among the many benefits of the building of the Aswan Dam are:
a. prevention of flooding of the Nile River
b. production of hydroelectric dams that power parts of Egypt
c. the advantage of water storage for future use.
The Aswan Dam is considered to be the low dam that the government of Egypt projected to be constructed at $3.1 Billion where Egypt had taken financial support from the World Bank and other donors.
I believe It would be a and c
