5. What is a Red Giant? Can our Sun become a Red Giant? Why or Why not?

no it can not be why because we have diffent DNA

Red giants are stars that have used up all their hydrogen and have no hydrogen to fuse with the helium. and yes our sun will become a red giant in like 8 or 5 million years to come and it will begin to expand and counsume mercury venus then earth and after consuming all the pllanets it will explode leaving debris