The correct answer is option 1, Humboldt current. The Humboldt current is a cold ocean current that flows northwards along the western coast of South America. It is named after the German naturalist Alexander von Humboldt who first documented its existence. The Humboldt current is a part of the larger South Equatorial current system and is driven by the trade winds and the rotation of the Earth.

Option 2, Brazil current, is incorrect. The Brazil current is a warm ocean current that flows southwards along the eastern coast of South America.

Option 3, Oyashio current, is incorrect. The Oyashio current is a cold ocean current that flows southwards along the eastern coast of Japan.

Option 4, Canary current, is incorrect. The Canary current is a cold ocean current that flows southwards along the western coast of Africa.