Trends in humane evolution have been

Options

A. Erect posture
B. Opposable thumb
C. Bipedal
D. All of these

Answer

### Step-by-Step Text Solution

1. **Understanding Human Evolution**: Human evolution refers to the gradual development of the human species from earlier hominins. This process involved various physical and behavioral changes over millions of years.

2. **Identifying Key Trends**:
- **Erect Posture**: This refers to the ability of humans to stand upright. The development of an S-shaped curvature in the vertebral column allowed for this straight posture, which is a significant adaptation in human evolution.
- **Opposable Thumb**: The evolution of the opposable thumb enabled humans to grasp objects more effectively. This adaptation is crucial for manipulating tools and performing intricate tasks, which are essential for survival and development.
- **Bipedalism**: This term describes the ability to walk on two feet. Early ancestors of humans were quadrupedal (walking on all fours), but over time, they evolved to walk upright on two feet, which is a defining characteristic of modern humans.

3. **Conclusion**: All three traits—erect posture, opposable thumb, and bipedalism—are significant trends in human evolution. Therefore, the correct answer to the question is "all of these."

### Final Answer: All of these.

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