SSC MTS EXAM

Detailed explanation-1: -An atoll forms when a coral reef builds up around a volcanic island, then the volcanic island erodes away, leaving a lagoon. Atolls are defined as one island even though they are made up of multiple communities of coral. The island regions of Micronesia and Polynesia are dominated by low islands.

Detailed explanation-2: -Micronesia is situated north of Melanesia and north and west of Polynesia. It includes the Island States and Territories Kiribati, the Marshall Islands, the Federated States of Micronesia, Nauru, the Marianas with the Commonwealth of the Northern Mariana Islands (CNMI) and Guam, and the Caroline islands with Palau.

Detailed explanation-3: -Thus, Oceania most commonly refers to the land areas of the South and Central Pacific.” Kennedy defined Oceania as including Australasia, Melanesia, Micronesia, and Polynesia.