Identify the stages in human evolution.
First to exhibit bipedal locomotion _______

Explanation

**Step-by-Step Solution:**

1. **Understanding Bipedal Locomotion**: Bipedal locomotion refers to the ability to walk on two legs. This is a significant evolutionary adaptation in humans.

2. **Identifying Early Hominins**: In the study of human evolution, several early hominins exhibited bipedal locomotion.

3. **First to Exhibit Bipedal Locomotion**: The first known species to exhibit bipedal locomotion is **Australopithecus**. This genus lived approximately 4 to 2 million years ago.

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