Hydroelectric power and natural gas was introduced in the late 1800s
Answer:
There are three main reasons why the Spanish were able to conquer and colonize the Americas: Disease. ... While conquistadors like Hernan Cortes in Mexico and Francisco Pizarro had great weapons and strategies, their greatest ally was disease. Better weaponry.
The purpose of making a pilgrimage to Mecca is to make Hajj, which is one of the Five Pillars of Islam. You pray at the site of the Ka'bah and Mecca is also the birthplace and deathplace of Muhammad. So the second option :)
