Which body of water separates Australia from Papua New Guinea?

The body of water that separates Australia from Papua New Guinea is the Torres Strait.12

Located between the Cape York Peninsula of Queensland, Australia, to the south and the island of New Guinea to the north, this passage connects the Coral Sea in the east with the Arafura Sea in the west. The strait is approximately 80 miles (130 km) wide and contains the Torres Strait Islands, which are geologically and historically significant to the region. Physically, New Guinea and Australia were connected until about 8,000 years ago, when the area was submerged by the shallow flooding that created the current strait.134