Rlly hard question idk what the answer is

Facts/data/information/reason to prove the us is democratic

Explain the popular saying "we are made of stardust. how are we made of stardust? use scientific vocab.

The sun a. will become a red giant within two to three million years b. is in its main sequence, which willlast thousands of years c. is in its main sequence, which will last billions of years. d. will explode as a supernova after its main sequence