Context: Figure: Great Barrier Reef.
The Great Barrier Reef is a tropical coral reef ecosystem near the northeastern coast of Australia.
Which better describes the Great Barrier Reef ecosystem?
A. It has water with not much salt. It also has many different types of organisms.
B. It has salty water. It also has many different types of organisms.
Pick the correct answer from the listed options and provide the letter of the selected option.

B