What term describes a person lacking in thought or deliberation in decision-making, often resulting in forgetfulness and distractions?

The correct term that describes a person who is lacking thought or deliberation in decision-making, leading to forgetfulness and distractions, is "impulsive." Impulsive behavior is characterized by hasty actions taken without careful consideration of the consequences. Individuals who exhibit impulsivity may struggle to process information thoroughly before making decisions, resulting in thoughtless choices or actions that can be easily forgotten or ignored. This behavior often arises from difficulties in self-control and an inability to pay sustained attention to tasks.

In contrast, the other terms provided do not fit the description. "Strategic" refers to a well-planned approach to decision-making, indicating forethought and careful consideration. "Reserved" describes a personality trait where an individual is restrained in their actions or expressions, which does not imply a lack of thoughtfulness. "Deliberate" suggests careful and intentional decision-making, the opposite of acting impulsively. Therefore, "impulsive" accurately captures the described characteristics of decision-making without critical thought or focus.