Which of the following behaviors is a positive indication that a person may be abusing drugs?

A sudden display of extreme emotions can be a positive indication that a person may be abusing drugs because certain substances can significantly alter an individual's mood and emotional responses. Drugs can lead to increased irritability, euphoria, or even unpredictable emotional swings that are not typical for the individual. This change in emotional stability can signal underlying issues related to substance use, reflecting how drugs can affect the central nervous system and impact behavior.

Other behaviors, such as a sudden loss of interest in hobbies, changes in eating habits, or increased social interaction, may also be signs of drug abuse but are less definitive on their own. For instance, withdrawing from hobbies might stem from a variety of factors unrelated to drugs, including personal issues or stress. Similarly, changes in eating habits are common for many reasons and might not necessarily relate to substance use. Increased social interaction, in contrast, could indicate positive engagement with social circles or new interests rather than drug abuse.