Which of the following is the best definition of magma

a an area of mountain valances
b vents in the earth were steam rises into the air
c the ridges of hard shiny black basalt rock that can be found in volcanic areas
d hot liquid rock beneath the earth's surface which can squeeze upward through cracks fussures

Which area of russia is volcanically active? a. ural mountains b. baltic sea c. kamchatka peninsula d. volga river

How did tyrants attempt to gain the approval of common citizens in ancient greece?

Why were chinese american immigrants frequently detained when trying to immigrate through angel island? the rules for immigration were stricter at this checkpoint due to health issues that were prevalent among asian populations at this time. the location of the island was difficult to reach, and ships to the mainland were often prevented from sailing more than once a week. immigration agents were notorious for asking immigrants confusing questions as a means of denying them entry. low wages caused a shortage of immigration officials, so many immigrants had to wait weeks or months before their applications were processed.