The correct answer is - Magma generated from a hot spot burned through the overlying plate to create volcanoes.
The Hawaiian Islands are all formed as a result of volcanic activity of a hot spot. The hot spot is stationary, but the islands are in the shape of a chain, not all in the same place. Also, the rocks on the islands that do not have active volcanoes are older, than the ones that do have volcanic activity. This suggests that the Pacific plate is moving. According the direction in which the islands are arranged, the Pacific plate seems to move toward northwest. As it moves, it moves over the hot spot. Since the hot spot is stationary, as the Pacific plate moves, eventually the volcanic activity will stop on the island that has moved further away from the hot spot. The magma from the hot spot will penetrate through the crust that came to be over it. That will result in new volcanic island emerging from the sea over the hot spot. The process goes on for millions of years, and it can result in hundreds of islands of volcanic origin.
The correct answer is - Olmec.
The Olmec civilization was existing in the period between 1,200 BC up until 400 BC. This civilization developed in Mexico, more specifically in the south-central lowlands of the country. The Olmec were a very advanced civilization for their time, and they are considered as the civilization that set the basis for all the others civilizations in Mesoamerica, like the more ''famous'' Maya and Aztec civilizations. The trademark of the Olmec is the big stone heads, about which there's lot of debates about their purpose and means.
Answer:
In representative democracy, citizens elect representatives, who in turn represents their interests in the elected government. The vast majority of democracies in the world are representative.
In a direct democracy, citizens have more direct ways to participe in the government, and in the making of the laws of the country or region. There are very few places in the world where direct democracy is the norm, Switzerland being perhpas the most noteworthy example.
