The emperor was <span>Vespasian</span>
The correct option is D. Volcanic eruption released large amounts of water vapor into Earth's early atmosphere.
Earth’s first atmosphere had lots of water vapor but it almost lacked oxygen. Eventually, frequent volcanic eruptions put several different gases into the air. These gases created a new type of atmosphere for Earth. The volcanic eruptions spewed gases such as nitrogen, carbon dioxide, hydrogen, and water vapor into the atmosphere, but no free oxygen. Without oxygen, there could not be life on Earth.
Around 2000 people in BC E their migration was (B)
<span> It survived the </span>fragmentation and fall of the Western Roman Empire<span> in the 5th century AD and continued to exist for an additional thousand years until it fell to the </span>Ottoman Turks in 1453. But why did it survive? <span>The eastern half of the Roman Empire was far less vulnerable to external attack, due to its geographic location. With Constantinople located on a strait, it was extremely difficult to breach the capital’s defenses; also, the eastern empire had a much shorter common frontier with Europe. It also benefited greatly from a stronger administrative center and internal political stability, as well as great wealth. The eastern emperors were able to exert more control over the empire’s economic resources and more effectively muster sufficient manpower to combat invasion. </span>
