Hominoids lived on trees. The trees provided them protection from the predators. The Hominoids were food gatherers. They procured food by gathering seeds, nuts, fruits, berries, tubers, etc. They were not meateaters. Hominids adapted to land-dwelling.
They began to use caves and extended stone boulders as shelters. These shelters on land provided them with considerable safety from the predators and from rain, wind and the sun. The Neanderthal man was the earliest cave dweller.
The shortage of food made them to scavenge for food. They covered long distances to forage or scavenge for naturally animals or leftovers of animals ** by predators. The above activities made them gradually develop an upright posture and consequently the bipedal motion.
This was required for survival. Hominines and the archaic human species added planned hunting and fishing to the already existing gathering, foraging and scavenging techniques. Planned hunting and making tools stimulated the growth in the brain size. The growth in brain size in turn helped them to plan and make better tools.
