Richard decided to spend his vacation backpacking to see how far from sea levels he could make it. The term underline in the sentence above can BEST be described as

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Richard decided to spend his vacation backpacking to see how far from sea levels he could make it. The term underlined in the sentence above can BEST be described as "a reference point for measuring elevation."

That is why Richard has decided to take his backpack and start walking and climb the mountain. The sea level is the point of reference to measure the elevation of a place, a town, city, or region. There are places at sea level such as the coasts of places located at high elevations such as Denver, Colorado.

If you want to practice resistance sports, the best way to do it is in high elevation places, such as Colorado. Indeed, in Colorado Springs there are the headquarters and training facilities of the US Olympic teams.

the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.

glass wants to live in a world of super heroes and villains. he have lived all his life trying to be responsible for the creating the origin story of a super hero; he schemed and caused many incidents (many of them fatal) hoping that someday someone with superpowers would show up and save the day.

he knew himself very much. he saw himself as a villain of a real-life super hero story. he was aware of his strengths (more than smart enough for being manipulative and scheming) and weaknesses (having fragile bones and having to rely on his mind to succeed).