Question

how did the ability of upright walking proved beneficial to the early man?​

Answer 1

Walking upright freed the hands for carrying and manipulating tools," says Chris Stringer, a leading anthropologist at the Natural History Museum in London. "It allows longer-distance walking and, eventually, endurance running. Ultimately, it may have been a key step that led our ancestors' brains to grow."

Answer 2

Answer:

The broken, disrupted terrain offered benefits for hominins in terms of security and food, but it also proved a motivation to improve their locomotor skills by climbing, balancing, scrambling and moving swiftly over broken ground - types of movement encouraging a more upright gait,” said University of York ...