Atolls are ring-shaped coral reefs, not islands.

The Great Barrier Reef is the largest coral reef system in the world, stretching over 2,300 kilometers along the coast of Queensland, Australia.

Climate change, particularly rising sea temperatures, is the primary cause of coral bleaching.

While tourism can impact coral reefs, it is not considered a major threat compared to overfishing, pollution, and climate change.

Accretion is the process by which coral reefs build and grow, as coral polyps secrete calcium carbonate, forming new reef structures.

Volcanic islands are formed when a volcano erupts beneath the ocean's surface, building up a cone-shaped structure.

Barrier islands are low-lying islands formed by the accumulation of sand and sediment, often parallel to the coastline.

Patch reefs are not considered a major type of coral reef structure compared to fringing reefs, barrier reefs, and atolls.

Degradation is the term for the process by which coral reefs are damaged or destroyed due to various factors such as pollution, overfishing, and climate change.

While climate change is a major threat to coral reefs, it is not considered a direct threat to island ecosystems.

Island endemism refers to the unique biodiversity found on islands, often including species that are not found anywhere else in the world.

While artificial reefs can be used to enhance marine habitats, they are not considered a primary conservation strategy for protecting coral reefs.

Coral restoration refers to the process of actively restoring damaged or degraded coral reefs through various techniques.

While limited resources, isolation, and vulnerability to natural disasters are major challenges for island communities, overpopulation is not typically considered a significant issue.

Island culture refers to the unique cultural and traditional practices found on islands, often passed down through generations.