Meaning: 'Undivided' means complete and not shared with anyone else, indicating that the attention is solely directed towards the only child.

Wrong options:

• constructive: 'Constructive' refers to something that is helpful or beneficial, which does not accurately describe the nature of attention in this context.
• insufficient: 'Insufficient' means not enough, which contradicts the idea of receiving full attention and does not fit the positive context of parental attention.
• observed: 'Observed' is a past participle that does not describe the type of attention but rather indicates something that has been seen or noted, making it irrelevant here.
• nurturing: 'Nurturing' describes a caring or supportive action, but it does not specifically refer to the type of attention received, thus it does not fit the context of the sentence.
• investigated: 'Investigated' means examined or studied, which does not relate to the type of attention and is grammatically incorrect in this context.

Correct answer: nurturing

Explanation: The term 'nurturing' fits grammatically as it describes the role of the eldest child in relation to their younger siblings. It aligns with the context of discussing how the eldest child takes care of and supports their siblings.

Meaning: 'Nurturing' refers to the act of caring for and encouraging the growth or development of someone, particularly in a familial context.

Wrong options:

• undivided: 'Undivided' refers to attention that is not shared, which does not describe a role and is therefore irrelevant in this context.
• constructive: 'Constructive' means helpful or beneficial, but it does not specifically describe the caring role of the eldest child, making it unsuitable here.
• insufficient: 'Insufficient' means not enough, which does not fit the context of describing a positive role and is grammatically incorrect in this context.
• observed: 'Observed' is a past participle that indicates something has been seen, which does not relate to the role of the eldest child and is not appropriate here.
• investigated: 'Investigated' means examined or studied, which does not pertain to the nurturing role and is irrelevant in this context.

Correct answer: observed

Explanation: The word 'observed' fits grammatically as it indicates that the personality attributes can be seen or noted in the eldest child. It aligns with the context of discussing traits that are noticeable in this specific role.

Meaning: 'Observed' means seen or noticed, indicating that these personality traits are evident in the eldest child.

Wrong options:

• undivided: 'Undivided' refers to attention that is not shared, which does not fit the context of describing personality attributes and is grammatically incorrect here.
• constructive: 'Constructive' means helpful or beneficial, which does not relate to the act of noticing personality traits and is not appropriate in this context.
• insufficient: 'Insufficient' means not enough, which does not fit the context of describing attributes that can be seen and is grammatically incorrect here.
• nurturing: 'Nurturing' describes a caring role, but it does not relate to the act of noticing or observing traits, making it unsuitable in this context.
• investigated: 'Investigated' means examined or studied, which does not fit the context of describing observable traits and is grammatically incorrect here.