Final answer:
The cloud that brings thunderstorms and lightning is called a thunderhead or a thundercloud. Thunderheads are large, towering clouds associated with strong upward air currents that contain significant moisture and are capable of producing heavy rain, lightning, and thunder.
Step-by-step explanation:
The cloud that brings thunderstorms and lightning is known as a thunderhead or a thundercloud. Thunderheads are large, towering clouds that are associated with strong upward air currents. These clouds contain significant amounts of moisture and are capable of producing heavy rain, lightning, and thunder. Thunderheads are most commonly found in the stage of a storm called the cumulonimbus stage, which is characterized by the presence of thunderstorms. In this stage, cumulonimbus clouds can extend into the stratosphere and are capable of producing severe weather phenomena such as thunderstorms, tornadoes, and hail.