Answer:
lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually, some of the magma pushes through vents and fissures to the Earth's surface. Magma that has erupted is called lava. Some volcanic eruptions are explosive and others are not.
I believe that water and sometimes even the wind can cause erosion.
I believe the answer is: <span>Variety
The smaller groups that exist in a </span><span>Variety usually happen because they possess a certain feature that distinguishes them from another group of the species.
This happen due to the adaptation process in response to things such as different climate or different geographical location.</span>
