Answer:
Marble is a type of rock. It is a metamorphic rock , which means rock which as changed it texture or shape or color over the time. These rocks are formed usually by uniting already existing substances on the earth. Limestone is the naturally available stone , which when undergoes metamorphosis turns into the formation of marble. Marble forms when the hot magma heats the limestone , the heat recrystallizes the calcite in the limestone changing its texture, shape etc.
If Antarctica has coal beds, and coal is formed from pressured carbon, then it indicates that Antarctica once had living organisms. Because living things are carbon based.
Unitary government:
1) Citizens elects a party into power. The head of the elected party will become the Prime Minister.
Federal system
1) Citizens elect their leaders by voting said individual to the position he/she is vying for like President, Senator, Governor, Representatives,etc.
2) Citizens are free to run for government office providing they pass the requirements of such position.
3) Citizens can veto the bill that the legislation is reviewing. They can write to their representative and state their reasons why they are against the passing of the bill..
Confederate
1) Citizens role are limited.
*There aren't many online articles about citizens' role in a confederate government.
Passing legislation because that is high levels
The answer is actually Convection.