Final answer:
The development of supercell rotation is a result of the processes of tilting and stretching. Wind shear initiates horizontal rotation which is then turned into a vertical rotation by updrafts, forming a mesocyclone.
Step-by-step explanation:
Supercell rotation develops as a result of the processes of tilting and stretching. During the development of a supercell, which is a severe type of thunderstorm, the wind's shear initiates rotation. This rotation is then tilted vertically due to updrafts within the storm. As the updraft strengthens and stretches the rotating air, a mesocyclone—a rotating column of air within the supercell—is formed. Supercell storms are commonly associated with severe weather phenomena such as large hail, strong winds, and tornadoes.