Answer:
Caspian Sea.
Step-by-step explanation:
The biggest lake in the world by volume is the Caspian Sea, which is actually considered a lake rather than a sea. It is located between Asia and Europe, and has a volume of approximately 78,200 cubic kilometers. The Caspian Sea is also the largest inland body of water in the world, with a surface area of around 143,000 square miles (371,000 square kilometers).