C. Read the paragraph and answer the question after.

The Hertzprung-Russell Diagram shows the three very different types of stars the first type is called the main sequence which includes the sun this stars are fueled by nuclear fusion converting hydrogen into helium the hotter the are the brighter they come the last for about 5 billion years The second type includes the supergiant. As they reach old age, they deplete their hydrogen supply.

Their core contracts as their outer layers expand. Eventually, they will explode becoming nebula or supernova, then white dwarfs, neutron stars, or black holes. Third smallest stars consequently becoming white dwarfs shrinking and depleting their nuclear fuels finally becoming cold dark black dwarfs.

1. What is paragraph about?
2. What things are enumerated to show the different types of stars?
3. What words or phrases signal the enumeration or listing?​