To make the audience feel light-hearted and happy or to give the feeling of content
They all refer to the different types of government systems there are. An example would be that the United States has a a federal government system because both the state governments and national government share equal power.
Answer:
Anything smaller than ten Earths wouldn't be a star anymore, but rather a cold and dark stellar remnant. If for any reason the Sun shrank smaller than the Earth, this shrunken Sun wouldn't have the mass to create fusion and would burn out completely.
