Its made up of gas and basicaly is a star
“Grass is a monocotyledon plant, herbaceous plants with narrow leaves growing from the base. A common kind of grass is used to cover the ground in a lawn and other places. Grass normally gets water from the roots, which are located in the ground.” This is NOT my information I found it on Wikipedia hope this helps
A population is a group of individuals of the same species that are capable of interbreeding.