In the figure below,what does the straight line indicate? 
Definitions:
Accidental Poisoning
The unintentional ingestion, inhalation, or absorption through the skin of harmful substances, leading to health complications.
Child-Resistant Containers
Packaging designed to be difficult for children to open, thereby reducing the risk of accidental ingestion of harmful substances.
Restraint Use
The practice of limiting the movement of patients in healthcare settings to prevent harm to themselves or others, using methods like physical restraints or medications.
Nursing Assistive Personnel
Healthcare workers who provide basic care under the supervision of nursing staff, including tasks like bathing, feeding, and assisting patients with mobility.
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