Humans make changes to the environment. ex. planting trees in an area where they have been harvested ex. people love to go dune bashing in the desert. (a: pull factor (b: human-environment interaction (c: hemisphere (d: human/cultural features

(d:human/cultural features 

The enviroment with hedge hogs

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.