Cradle of human evolution is

Options

A. Grassland of South Africa
B. Savannah of Central Africa
C. Subarctic Europe
D. Arabia.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the "cradle of human evolution," which refers to the geographical area where human evolution is believed to have originated.

2. **Analyzing the Options**: The options provided are:
- Grassland of South Africa
- Svana of South Africa
- Sub-arctic Europe
- Arabia

3. **Identifying Key Evidence**: Research and paleontological evidence indicate that the origins of human evolution are primarily found in Africa. Numerous fossil discoveries have been made in this continent, particularly in South Africa.

4. **Notable Fossil Discoveries**: Important fossils related to human evolution, such as Australopithecus africanus, Homo habilis, and Homo erectus, have been discovered in Africa. These fossils provide significant evidence for the evolutionary lineage of humans.

5. **Cradle of Humankind**: There is a specific site in South Africa known as the "Cradle of Humankind," which is recognized as a World Heritage Site due to the abundance of hominid fossils found there. This site further supports the idea that Africa is the primary location for human evolution.

6. **Conclusion**: Based on the evidence and the significance of the Cradle of Humankind site, the correct answer to the question is the "grassland of South Africa."

**Final Answer**: The cradle of human evolution is the grassland of South Africa.

---