interdependence means the mutual reliance between different things or people
the rainforest is interdependent because of the nutrient cycle, everything supports everything else
the tropical rainforest has to be interdependent because of how infertile the soil is, every nutrient counts for the life of another plant or even animal
the main components of the tropical rainforest are climate, tree roots, vegetation, animals and even people, the interaction between these, create and interdependence on each other in order to live in harmony