他们对于这种多样性存在的线索知道很少。
The best information on early population movements is now being obtained from the 'archaeology of the living body', the clues to be found in genetic material.关于早期人口迁移的最佳信息现在可以从“活体考古学”中获取,这是在遗传物质中发现的线索。
The answer matches the clues. The answer is reasonable.答案和线索相符合。答案是合理的。