-less amount of living areas for the deer
-less food will be available for other animals and other deer
The key difference between hominins and all other anthropoids is that hominins have bipedal posture, which plainly put means that they walk on two feet.
Yes. Some mammals may have less hair/fur, but all mammals do. It is a defining characteristic of a mammal.
B because it sets the scene and describes what it is like!