Concept:The largest barrier reef system in the world is the Great Barrier Reef, located off the northeast coast of Australia.
Explanation:The Great Barrier Reef is the world’s largest coral reef system.
It consists of over 2,900 individual reefs and 900 islands.
It stretches over 2,300 kilometres in the Coral Sea.
The reef lies off the coast of Queensland, Australia.
This location corresponds to the north‑east Australian coast.
Therefore, the correct option is the north‑east Australian coast.
Answer:Option A: North East Australian Coast