Seismograph's drum feel the seismic waves. There is a weight that moves the pen so that when the seismic waves are felt, the pen jiggles and records it on paper.
I believe that the answe is c
Answer- b
Answer:
The United States has a good amount of freshwater supply over most of the territory, because the American territory is ripe with lakes, rivers, streams, and groundwater.
The quality of these water sources varies from area to area, and many water bodies have been deeply polluted by human activity. However, the United States is a developed country with generally good water treatment facilities.
Notwithstanding, the United States faces two important challenges: one is the growing population of the country, which will put more pressure on freshwater sources in the future. The other one is that a few areas of the country are devoid of water supply sources, and they are among the fastest growing regions of the U.S (Nevada, Arizona, New Mexico). This poises a great challenge for U.S. authorities in the near future.
The Gulf of Mexico lies between Mexico and Florida.
Answer:
The Origin of Islam: According to Secular History. The origin of Islam can be traced back to 7th century Saudi Arabia. Islam is thus the youngest of the great world religions. The prophet Muhammad (circa 570-632 A.D.) introduced Islam in 610 A.D. after experiencing what he claimed to be an angelic visitation.
Explanation:
