Question

is analyzed by qualitative methods.
the method used by the suspect to kill the person
the identity of the poison used in a murder
the amount of poison used in a murder
the location of the poison used in a murder

Explanation:

Qualitative analysis focuses on identifying the nature or identity of a substance. In forensic science, determining the identity of a poison (e.g., whether it's arsenic, cyanide, etc.) is a qualitative task. The method of killing is more about reconstructing a sequence of events (not directly a chemical - identity - based qualitative analysis). The amount of poison is a quantitative analysis (measuring a quantity). The location of the poison is more about spatial aspects rather than the chemical identity.

Answer:

The identity of the poison used in a murder