Answer:
The Pliocene hominids walked on two feet.
Step-by-step explanation:
Laetoli is located in Tanzania near Olduvai George, a region where it has been found the oldest fossils of hominids in the world.
The Laetoli site is famous because of its human footprints preserved in volcanic ash. Mary and her team discovered the footprints on the '70s and they proved that the hominids of the Pliocene period walked in two feet.
I hope this answer helps you.