Respuesta :
Answer: Option (1), (2) and (6)
Explanation: The size of the crystals depend upon the rate of cooling. If the rate of cooling is fast, then it forms finer crystals and if the rate of cooling is slow then it forms bigger crystals.
Magma when comes out of the surface, is known as lava and it cools really fast and the crystals doesn't get proper time to form, so smaller crystals are formed from lava.
Minerals can form in any type of solution, but the compounds as well the elements doesn't leave the solution. And when they are carried by a small stream it produces a channel in the adjacent rock.
Thus the correct answers are 1, 2 and 6.