During evolution of man many changes have taken place in his ancestral characters. Which one of the following is an unsignificant change

Options

A. Loss of tail from body
B. Increase in the ability to communicate with others and develop community behaviour
C. Arboreal mode of lifestyle
D. Perfection in the structure and working of hand for tool-making

Answer

To solve the question regarding the insignificant change during the evolution of man, we need to analyze the provided options one by one.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for an insignificant change in the ancestral characters of man during evolution. We need to identify which of the given options is less important in the context of human evolution.

2. **Evaluate the Options**:
- **Option 1: Loss of tail from body**:
- In many animals, tails serve important functions such as balance, communication, and mobility. However, in the context of human evolution, the loss of the tail is considered an insignificant change because humans have adapted to bipedal locomotion, where a tail is not necessary for balance.

- **Option 2: Increase in the ability to communicate with others and develop community behavior**:
- This change is significant as communication is a key characteristic that distinguishes humans from other species. It has played a crucial role in social interactions and the development of societies.

- **Option 3: Arboreal mode of lifestyle**:
- This refers to living in trees. While early ancestors may have had arboreal traits, the transition to a terrestrial lifestyle was significant for human evolution, affecting mobility and survival.

- **Option 4: Perfection in the structure and working of hand for tool making**:
- The development of hands capable of making tools is a major evolutionary advancement that has greatly influenced human survival and development. This is a significant change.

3. **Identify the Insignificant Change**:
- After evaluating all options, the **loss of tail from body** is identified as the insignificant change in the context of human evolution. While it may have had some functional roles in other species, it is not critical for humans.

### Conclusion:
The correct answer to the question is **loss of tail from body**.

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