Environments are extremely important when it comes to both character and creature designs. In the case of characters: It tells something about that person, and the situation he or she is in. In the case of creatures it tells a lot about their behavior and nature.

The effect of the environment on living organisms

Natural environments are subject to weather, location, height, if water is nearby and what kind of water this is the neighboring environment, and so much more. These factors affect what plant species can grow in an area. And these, in their turn, affect what animals can live in that specific area. Taking all the other factors into account. Evolution is a way to make sure that species can keep surviving. It’s a process of elimination. If you can’t keep up with changes, or your new evolutionary trait is useless, it, or you, will likely die out.