Human activity has led to clear cutting of the world's rainforests. Which is the best explanation of why this change has been detrimental? A) Cutting down the rainforest disrupts some trading routes. B) Cutting down the rainforest has created more land on which to grow food. C) Cutting down the rainforest makes the areas less desirable for tourists. D) Cutting down the rainforest destroys the habitat for a number of species