3 reasons forensic investigators need good observation skills.

Forensic investigators look through a crime scene, finding physical evidence of a crime (blood, weapons, ect.) and therefore, need good observational skills to find these items. In addition to finding this evidence, more observations are required to determine what they mean in the crime. These same skills will also be needed to observe how these items correlate with the suspects to the crime, such as a finger print matching one of the suspects.

Explanation:

I googled what a forensic investigator was, and went off of that :|

pattern wax

explanation:

pattern wax is used for casting restoration as part of lost-wax technique.