Out of these four ozone is the odd one.
1. Byson gorge and Grand canyon are hilly areas.
2. Rivers flow through them.
3. Plants and trees are present there.
4. Thar desert is a vast sand desert, with no water. It has thorny bushes and some kinds of desert plantations.
5. Above three are landforms.
6. But Ozone is an inorganic molecule with the chemical formula 03. It is a pale blue gas with a distinctively pungent smell. Ozone’s 03 formula was determined in 1865.