Which of the following animals has more than one heart ?

Octopus

The correct answer is Option (4)- Octopus

The correct answer is: Octopus

Explanation: Octopuses have three hearts. Two of these hearts are called "branchial hearts," and they are located near the gills. These branchial hearts pump blood to the gills, where it picks up oxygen. The third heart, known as the "systemic heart," pumps oxygenated blood throughout the body. This unique circulatory system allows octopuses to efficiently distribute oxygen-rich blood to their tissues, supporting their active and agile lifestyle.