Parasitism - A tick is attached to this rainforest toad. The tick benefits by having a supply of blood. The toad is harmed as the loss of blood will eventually weaken it and possibly result in its death. The animal that gets hunted or eaten is called its prey. Above, a neotropical rain frog is swallowed by a rear-fanged snake.
Predation is a fact of life in the rainforest.
It helps keep the food chain in balance. Because of the number of organisms and complexity, no single drawing can possibly show a complete rainforest food web. I will try to improve it from time to time. Above pyramid for illustration purposes only. Not drawn to scale.