If you mean which species, it would be the Homo sapiens.
To determine the cause of death and to see if there are other important factors that contributed to their death such as how and if they had a health condition which should then be known to their family. Also for extra evidence to see if they can find out more about the case.
<span>By looking at published and reviewed articles, the two could analyze different theories and see if either of their conjectures are correct. By doing this, Lesley and Stephen can look to see if there are any replicable studies that give credence to either viewpoint.</span>
