Which of the following is NOT needed for a hurricane to form? very cold ocean waters (under 60 F)
atmosphere to cool quickly with height
very little change in wind speed or direction as the air races upward
some sort of pre-existing low-level disturbance

i believe the answer is a or 1

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )

a chain link fence because there so tiny even my albino donkey can't get out

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.