Why did walking on two legs help australopithecus survive?

Walking on two legs, or bipedalism, allowed Australopithecus to cover larger distances more efficiently, which helped them find food and water in varied environments. This upright posture also freed their hands for tool use and carrying objects, enhancing their ability to manipulate their surroundings. Additionally, bipedalism reduced exposure to the sun while foraging in open areas, providing a survival advantage in their habitat. Overall, these adaptations contributed to their ability to thrive in diverse landscapes.