Answer:
Substances that are used as poisons often have certain characteristics that make them attractive for this purpose. These characteristics include: the substance is easily accessible or can be prepared quickly; it is odorless, tasteless, or colorless; it is not easily detected; it can be administered in large doses without leaving traces; and it is lethal or causes severe symptoms. Additionally, some substances have the added benefit of being able to cause death without leaving a trace, making them particularly attractive as poisons.