Hominids and why the started to walk!

Why did early humans begin to walk?

There are tons of reasons why they started to walk and i will run you through a couple of them,

• So early humans first lived in the forest of Africa where they walked on fours but after a while the forest started to change to long grass and desert, so the early humans thought it might be easier if they could look over the grass and see in there are any predators or to see in theres food or not. Scientist say early humans started to try standing up in the forest and after the forest changed they used the two legs.
• Another theory is a sexual related one, scientist think that early human changed to impress the females because the men could stand up and they looked cooler, they also think they changed because they could carry more for the females because when the females have the baby the men go out for food, so with the ability to walk on two legs they could carry more and they could reach for higher thing like apples in the trees.
• Another theory is that they got the two legs so that the could move across the savanna and they could move fast a go across more ground in a faster period, but some scientist disagree with this and they say on four legs you can move faster because a horse it has four legs and it moves a lot faster then a human and horses are better climber up mountains then humans. So scientists are arguing over this, but i think it is better to have two legs because we can move better around rocks and we can walk faster over the rocks then a horse