What does bipedalism allow hominins to do?

Bipedalism allows hominins to walk upright on two legs, which is a significant adaptation in human evolution. This mode of locomotion frees the hands for carrying objects, using tools, and gesturing, which has played a crucial role in the development of social behaviors and communication among early humans. The upright posture also helps with improved visibility over long grasses and allows for more efficient long-distance travel on land. This adaptation is key to the survival and success of hominins in various environments, enabling them to explore and exploit diverse habitats more effectively than quadrupedal animals.

The other options do not accurately reflect the primary advantage of bipedalism. For instance, while bipedalism may contribute to moderate running ability, it does not primarily enhance speed compared to other animals. Similarly, swimming efficiently and climbing trees are activities more suited to other forms of locomotion, indicating that these are not advantages gained from bipedalism.