A.I. Explanation:

Correct answer: flexible

Explanation: The word 'flexible' describes the ability to adapt or change, which fits the context of thinking in early adulthood as it contrasts with the rigid thinking of adolescents. This aligns with the overall sentiment of growth and balance in thought processes.

Meaning: Flexible means capable of bending easily without breaking; in this context, it refers to adaptable thinking.

Wrong options:

• dichotomies: Dichotomies refer to divisions into two contrasting parts, which does not fit the context of describing a quality of thinking.
• advances: Advances imply progress or improvements, which does not directly relate to the adaptability of thought.
• position: Position refers to a particular way of thinking or stance, which does not describe the quality of being adaptable.
• sustainable: Sustainable refers to the ability to be maintained at a certain rate or level, which does not apply to the nature of thinking.
• section: Section refers to a distinct part of something, which does not relate to the quality of thought.

Correct answer: dichotomies

Explanation: The term 'dichotomies' refers to the division of ideas into two opposing categories, which accurately describes the black-and-white thinking characteristic of adolescents. This fits grammatically and contextually within the sentence.

Meaning: Dichotomies are divisions into two mutually exclusive or contradictory groups.

Wrong options:

• flexible: Flexible describes adaptability, which does not fit the context of rigid thinking in adolescents.
• advances: Advances imply progress, which does not relate to the concept of thinking in absolute terms.
• position: Position refers to a stance or viewpoint, which does not capture the idea of binary thinking.
• sustainable: Sustainable refers to maintainability, which does not apply to the nature of thought processes.
• section: Section refers to a part of something, which does not relate to the concept of thinking in dichotomous terms.

Correct answer: position

Explanation: The word 'position' refers to a particular stance or viewpoint, which fits well in the context of recognizing varying degrees of right and wrong in thoughts. It maintains grammatical coherence and aligns with the overall message of the passage.

Meaning: Position refers to a particular way of thinking or stance on an issue.

Wrong options:

• flexible: Flexible describes adaptability, which does not fit the context of recognizing varying viewpoints.
• dichotomies: Dichotomies refer to binary divisions, which does not fit the context of acknowledging complexity in thought.
• advances: Advances imply progress, which does not relate to the concept of recognizing different positions.
• sustainable: Sustainable refers to maintainability, which does not apply to the context of thought processes.
• section: Section refers to a part of something, which does not relate to the concept of viewpoints.