Which one of the following is not a cold current ?

Ocean currents are classified as warm or cold based on their temperature relative to the surrounding water. The Eastern Australian Current (EAC) is a warm ocean current. It flows southward from the tropical Coral Sea along the east coast of Australia, transporting warm equatorial waters toward the temperate regions of the South Pacific.

The other options listed are all cold currents:

• Western Australian Current: A cold current in the Indian Ocean flowing north along the west coast of Australia.
• Benguela Current: A cold current flowing north along the west coast of Africa in the South Atlantic.
• Peru (Humboldt) Current: A cold current flowing north along the west coast of South America in the South Pacific.

Therefore, the Eastern Australian Current is the only one among the choices that is not a cold current.