Which one is irrelevant to evolution of man?

Options

A. Perfection of hand for tool making
B. Change of diet from hard nuts/roots to soft food
C. Increased ability to communicate or develop community behaviour
D. Loss of tail.

Explanation

To determine which option is irrelevant to the evolution of man, we can analyze each option provided:

1. **Perfection of hand for making tools**:
- The human hand has evolved to have an opposable thumb, which allows for the manipulation of tools. This adaptation is crucial for survival and development in human evolution. Therefore, this is relevant to the evolution of man.

2. **Change of diet from hard nuts or roots to soft food**:
- The evolution of human diet has played a significant role in shaping our physiology and social structures. The transition to softer foods is linked to changes in our dental structure and digestive system. Hence, this is also relevant to the evolution of man.

3. **Increased ability to communicate and develop community behavior**:
- Communication and social behavior are fundamental aspects of human evolution. The ability to form communities and communicate effectively has been essential for survival and cooperation among humans. Thus, this is relevant to the evolution of man.

4. **Loss of tail**:
- While our ancestors had tails, humans do not have them. The loss of the tail does not negatively impact human survival in our current environment, making it less relevant to our evolutionary success. The loss of a tail is a trait that does not affect our current functionality or adaptation. Therefore, this is considered irrelevant to the evolution of man.

**Conclusion**: The option that is irrelevant to the evolution of man is the **loss of tail**.

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