What layer of the rainforest has the most animals?
Why are some animals in the rainforest different colors like blue frogs?
Why are rainforests in Africa different from forests in South America?
How do animals communicate in the canopy?
When you ask about which area has the most animals if you mean species wise it is the canopy. By numbers it is the forest floor where ants and termites rule
Different colors in animals are the result of Natural selection. It is thought that ths colors of frogs is protective tellig predators "do noy eat me"
This again lies in the field of evolutionary biology. Differences are due to natural selectuin
By sounds and coloration with birds and behavior patterns. Insect use pheramones