Read the following passage and answer the questions given after it.
The Great Barrier Reef is one of the most significant natural wonders in the world. Located off the coast of Australia, it is the largest coral reef system on the planet and stretches for over 2,300 kilometers. The reef is home to a diverse range of marine life, including over 1,500 species of fish and 600 types of coral.

However, the Great Barrier Reef is under threat due to climate change. Rising sea temperatures and ocean acidification caused by the burning of fossil fuels are causing significant damage to the reef. Coral bleaching, a phenomenon where corals expel the colorful algae that live in their tissues, has become more frequent and severe. This process can lead to the death of the coral and the loss of habitat for the many creatures that rely on it.

Efforts to protect the Great Barrier Reef are ongoing. The Australian government has implemented measures such as the Reef 2050 Plan, which aims to improve water quality, reduce carbon emissions, and protect vulnerable species. Additionally, there are various organizations and initiatives working to protect the reef, including research programs and citizen science projects.