Понимание структурно-смысловых связей в тексте

Beauty of the Cayman Islands

The Cayman Islands are some of the most naturally beautiful locations in the Caribbean. The Cayman Islands are three islands made up of Grand Cayman, Little Cayman, and Cayman Brac.
The ocean at sunrise and sunset is the most popular scene with photographers on the Cayman Islands. But these islands are committed to conservation A __________, both above and below the water’s surface. There are many protected coral reefs around these tropical islands to explore and enjoy. Some reefs have small holes and cave-like structures B __________, like silverside fish that hide in the shadows. In addition to the coral reefs around the islands, the shipwrecks in the nearby waters deserve special attention. The Kittiwake shipwreck is the most unusual one C __________, about 76 m long and attracts many tropical fish.
The colourful and colonial architecture of George Town on Grand Cayman is interesting as well. The small duty-free shops and waterfront restaurants along the harbour showcase the life in the village, D __________ on the other side of the island.
The Cayman Crystal Caves provide a glimpse into the amazing life on the islands millions of years ago. Water erosion E __________ of the islands resulted in spectacular crystal formations. There are three wonderful caves to visit, each with delicate stalactite and stalagmite formations, F __________.

1. because it covers a very large area
2. because there is rare beauty to keep
3. which were created one drop at a time
4. that serve as protection for sea life
5. and other attractions of the Cayman Islands
6. which is a contrast to the natural scenery
7. and environmental changes to the landscape