Final answer:
A low pressure system of tropical origin in the Atlantic and Caribbean basin with sustained winds of at least 74 mph is known as a hurricane.
Step-by-step explanation:
A low pressure system of tropical origin in the Atlantic and Caribbean basin with sustained winds of at least 74 mph is known as a hurricane. Hurricanes are powerful storm systems characterized by low pressure centers, strong winds, and heavy rains. They typically develop over warm ocean waters and can cause significant damage when they make landfall.