Living organisms are made up of organic matter. We as human are made up of nutrients and water and chemicals. While those structures like bridges are made from hard materials, some forged by man and some found in earth like metal and gold. They can heat up and be molded while living organisms die or burn to ashes
Carbohydrates, proteins, and lipids are all made out of carbon atoms.
These three substances are essential for most living things in obtaining energy to sustain their living.
Not only that, carbon played an important role during the photosynthesis process, which produces oxygen needed for all living organism
Thick body fat layers.
The temperature remains low and there is a decent amount of precipitation. With both of those in mind, we can assume the climate is from a cold, possibly snowy area.