The oldest ancestor of human who used stones for making tools but essentially ate only fruits:

Options

A. Dryopithecus
B. Australopithecus
C. Homo Erectus
D. Ramapithecus

Answer

To solve the question about the oldest ancestor of humans who used stones for making tools but primarily ate fruits, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify the oldest ancestor of humans that used stone tools and had a diet mainly consisting of fruits.

2. **Evaluate the Options**:
- **Option 1: Dryopithecus**: This group is considered a common ancestor of both humans and great apes. They were primarily ape-like and did not primarily use stone tools. Therefore, this option is incorrect.

- **Option 2: Australopithecus**: This genus is known for being one of the earliest ancestors of humans. Australopithecus is recognized for using simple stone tools and having a diet that included fruits. Thus, this option is likely the correct answer.

- **Option 3: Homo Erectus**: This species is known for more advanced tool use and a varied diet, including meat. They are not the oldest ancestor and do not fit the criteria of primarily eating fruits. Hence, this option is incorrect.

- **Option 4: Ramapithecus**: This genus is often considered to have some human-like characteristics, but it is not primarily associated with the use of stone tools or a fruit-based diet. Therefore, this option is also incorrect.

3. **Conclusion**: Based on the evaluation of the options, the correct answer is **Option 2: Australopithecus**. This genus is recognized as the oldest ancestor of humans who used stones for making tools and primarily consumed fruits.

### Final Answer:
**The oldest ancestor of humans who used stones for making tools but essentially ate only fruits is Australopithecus.**

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