Complete the text using the phrases in the box.

A. environmental challenges D. thousands of visitors

B. stunning biodiversity E. a UNESCO World Heritage Site

C. unique rock formations

One of the most remarkable natural wonders of the world is the Galápagos Islands, located in the Pacific Ocean. The islands are famous for their (36) ______, which include species found nowhere else on Earth. In 1978, the Galápagos were recognized as (37) ______, a title that helps protect the islands' delicate ecosystem.

The islands are home to (38) ______ each year, who come to experience the pristine beaches and observe the diverse wildlife, such as giant tortoises and marine iguanas. Among the most impressive features of the islands are the (39) ______, which have been shaped over millions of years by volcanic activity.

However, the Galápagos face (40) ______, such as invasive species and climate change, which threaten the delicate balance of life on the islands. It is essential that conservation efforts continue to protect this incredible natural wonder.

Rewrite the sentences without changing their meanings.