Can you find coral in the Great Barrier Reef?
Yes, you can.
Is this - a) the Aurora Borealis or b) Paricutin?
This is the Aurora Borealis.
Mount Everest is the tallest what?
Mount Everest is the tallest mountain in the world.
Is this - a) Victoria Falls or b) the Great Barrier Reef?
This is the Great Barrier Reef.
Is this - a) the Grand Canyon or b) Mount Everest?
This is Mount Everest.
How many natural wonders of the world are there?
There are seven.