The most apparent change during the evolutionary history of Homo saplens is traced in

Options

A. Loss of body hair
B. Walking upright
C. Shortening of the jaws
D. Remarkable increase in the brain size

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the most apparent change during the evolutionary history of Homo sapiens. "Apparent change" refers to a noticeable or significant change that can be easily observed.

2. **Analyzing the Options**:
- **Option 1: Loss of Body Hair**: This change occurred gradually over time and is not considered an apparent change.
- **Option 2: Walking Upright**: The evolution of bipedalism (walking upright) also happened gradually, transitioning from semi-erect to fully erect posture.
- **Option 3: Shortening of the Jaws**: Like the previous options, this change occurred gradually over time and is not an immediate or apparent change.
- **Option 4: Remarkable Increase in Brain Size**: This is a significant and noticeable change in the evolutionary history of Homo sapiens. Early hominins like Homo habilis had a cranial capacity of about 600 cc, while modern Homo sapiens have a cranial capacity ranging from 1300 to 1600 cc. This represents a rapid and significant increase in brain size.

3. **Conclusion**: After analyzing all the options, the most apparent change during the evolutionary history of Homo sapiens is the remarkable increase in brain size. Therefore, the correct answer is **Option 4**.

---