User: Many animals have body symmetry with distinct front and back ends. This type of symmetry is A. unilateral symmetry.
Cumulonimbus, from the Latin cumulus (heap) and nimbus (rainstorm, storm cloud), is a dense towering vertical cloud associated with thunderstorms and atmospheric instability, forming from water vapor carried by powerful upward air currents.
Cumulonimbus is a type of cloud, similar to cumulus, that extends to a great height and is associated with thunderstorms. [technical] COBUILD Advanced English Dictionary.