Jungle - 

A forestAn area with many trees. that has many trees and plants growing very close to one another, usually found near the equator in areas with high humidity and heavy rainfall.

Juvenile - 

A young animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. either still cared for by adults or able to care for itself, but not sexually mature or of adult size or status.