Question

Sedimentary islands made of coral depositions. These islands have little relief and are often only a few feet above sea level. Often, they are arranged in a semi-circle to form and atoll around a lagoon. Examples include: Nauru and Kiribati--most of Micronesia and Polynesia (At Risk of being submerged by water)

Answer 1

Coral atolls are low-lying islands made of coral depositions, often arranged in a semi-circle around a lagoon. Examples include Nauru and Kiribati. However, these islands are at risk of being submerged by water due to rising sea levels.

Step-by-step explanation:

Sedimentary islands made of coral depositions are known as coral atolls. These islands are typically low-lying and have little relief, often only a few feet above sea level. They are often arranged in a semi-circle to form a ring-like structure around a lagoon. Examples of coral atolls include Nauru and Kiribati, as well as many islands in Micronesia and Polynesia. However, these islands are at risk of being submerged by water due to rising sea levels.