Trees grow all over the world. They must adapt to different types of conditions from the icy cold to the desert dryness. For example, mangrove trees grow in tropical regions along the sea. In fact, they are sometimes called the forests of the sea. The roots of the mangrove tree are adapted to cope with the soft mud underwater by growing downwards like stilts toanchor it in place.
Some roots grow upwards until they are sticking out of the water in order to reach oxygen.
The roots also have a special filtering system to remove the salt from the seawater they take in. You most likely have heard about tropical rain forests. But in the countries to the south of the United States, other kinds of forested areas exist which you may have heard a great deal about, but have never seen. There are many factors which influence the forest type. Forest type vary by rainfall, temperature, type of soil, animal life, the number of dry months, altitude, and slope .