The best answer from the options is the following one:
There's tremendous biodiversity in the plant life of the tropical rain forest.
Actually, I don't think this is the main argument that is being used, people rather mention the overall influence of tropical forest of Earth's climate, but it's an additional support: for example, we could have access to precious medical substances in this forest that we don't yet know about .
Answer: 4. A Mountain Range
Explanation:
Mountain ranges are formed as a result of compression forces pulling tectonic plates together and forcing them to collide. Upon collision, the affected areas will have no place to go but up and soo will form a mountain range.
The movements of these plates can be quite slow such that mountain ranges take between thousands to hundreds of thousands of years to form. Mt. Everest for instance was formed as a result of such collisions and it increases by only 2 cm a year.
