volume of a sphere=(4/3)πr³
question is kind of strange but this depends on personal preference. I would go with the first one bc I'm too lazy lol. But if you're someone that's not, you might pick the last option because you don't want to run out before you don't even start the fire lol
It produces lava, which is what magma is called when it leaves the center of the earth. It exits through a fault or volcano.
The desert? Its completely dry so what other biome?
