In the tropical humid most of the vegetation comes from the tropical rainforest.  The tropical humid contains warm temperatures and a lot of rainfall all year. Since there is continuos rainfall exotic vegetation such as orchids that refuse to grow anywhere else on the planet. Also many exotic animals live in tropical humid climates. For example many species of monkeys, birds, and jaguars live in tropical humid climates because of its abundance of fruit. Not only do animals live there, but there are thousands of species of insects that live in this climate because they have an huge source of plant life that they can eat and live in. 

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