A.I. Explanation:

Option 1: "Increased costs for accessing music"

Explanation: This option is incorrect because the text states that music streaming services offer vast libraries for a monthly subscription fee, which implies affordability rather than increased costs. The main idea of the text emphasizes democratization and accessibility, not higher expenses.

Option 2: "Limited music availability to certain regions"

Explanation: This option is incorrect as the text highlights that streaming services have broken down barriers, allowing global exposure for emerging artists. Therefore, it contradicts the idea of limiting music availability, which is not supported by the text.

Option 3: "Decreased the overall quality of music production"

Explanation: This option is incorrect because the text does not mention any decline in music quality. Instead, it focuses on how streaming services have transformed access and exposure, which does not imply a decrease in quality.

Option 4: "Democratised access to a wide variety of music"

Explanation: This option is correct as the text explicitly states that streaming services have democratised access to music, allowing users to explore a wide variety of genres and artists. This aligns with the main idea of the text, which emphasizes the positive impact of streaming services on music accessibility.