A.I. Explanation:

Correct answer: lasting

Explanation: The word 'lasting' fits grammatically as it describes a sense of happiness that endures over time, aligning with the context of music's psychological effects. It conveys a strong, positive connotation that matches the overall sentiment of the passage.

Meaning: 'Lasting' means enduring or continuing for a long time, suggesting that the happiness derived from music is not just temporary.

Wrong options:

• ephemeral: Ephemeral means lasting for a very short time, which contradicts the idea of a sustained sense of happiness.
• transient: Transient also implies a temporary state, which does not align with the notion of a deep, enduring happiness from music.
• fleeting: Fleeting suggests something that passes quickly, again contrasting with the idea of a lasting effect.

Correct answer: enhance

Explanation: The word 'enhance' is appropriate here as it indicates an improvement in productivity, which is consistent with the context of music's positive influence on work efficiency. It fits grammatically and contextually, as it aligns with the idea of music boosting concentration.

Meaning: 'Enhance' means to improve or increase the quality, value, or extent of something, in this case, productivity.

Wrong options:

• impede: Impede means to hinder or obstruct, which is the opposite of what the sentence conveys about music's effects on productivity.
• obstruct: Obstruct also means to block or impede, which contradicts the intended meaning of music enhancing productivity.
• prohibit: Prohibit means to formally forbid something, which does not fit the context of music positively influencing productivity.

Correct answer: elevate

Explanation: The word 'elevate' is suitable as it indicates an increase in heart rate and energy levels, which aligns with the context of music's energizing effects during physical exercise. It fits grammatically and logically within the sentence structure.

Meaning: 'Elevate' means to raise or lift something to a higher position, in this case, referring to an increase in heart rate and energy.

Wrong options:

• stabilise: Stabilise means to make something steady or stable, which does not convey the idea of an increase in heart rate or energy levels.
• reduce: Reduce means to make smaller or less in amount, which contradicts the idea of an increase in heart rate and energy.
• maintain: Maintain implies keeping something at the same level, which does not suggest an increase, as required by the context.

Correct answer: mitigate

Explanation: The word 'mitigate' is appropriate as it means to make something less severe, serious, or painful, which fits the context of music therapy helping to reduce stress. It aligns grammatically and contextually with the therapeutic benefits of music.

Meaning: 'Mitigate' means to lessen the intensity or severity of something, in this case, stress.

Wrong options:

• exacerbate: Exacerbate means to make a problem worse, which is the opposite of what the sentence intends to convey about music's therapeutic effects.
• ignore: Ignore means to pay no attention to something, which does not fit the context of actively managing stress through music therapy.
• enhance: Enhance means to improve or increase, which does not align with the idea of reducing stress, as required in this context.