Answer:
Detailed measurements of the expansion rate of the universe place the Big Bang at around 13.8 billion years ago, which is thus considered the age of the universe. After its initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later atoms.
Explanation:
Limestone would be your correct answer. Limestone is a VERY weak rock that is easily dug out by the elements. Hope this helps :)
Russia is the largest country.
They allow magma to burst between cracks, and they cause blocks of rock to seperate and form new plates.