Why is the Tasmanian devil so mean?
Tasmanian devils are not "mean". This term is used to describe a human characteristic.
Generally, Tasmanian devils are shy and reclusive, and they avoid confrontations. However, they can be aggressive when they sense a threat to their food supply. They can also be aggressive and vicious when engaged in territorial disputes. They are not "mean".
A "Tasmanian Devil" is an animal. As such it does not have any geography. The Term "geography" can only be applied to land not animals. For instance you could as "What is the geography of Tasmania" or "What is the geographical habitat of the Tasmanian Devil" but not "What is the geography of a Tasmanian Devil". For the habitat of the Tasmanian devil, see the related question.