What astronomical observation is most severely hampered by increasing levels of urban light pollution?

Correct option is C

The correct answer is (c) Deep-sky objects.
• Light pollution overwhelms faint light from distant celestial objects.
• Galaxies, nebulae, and star clusters become difficult to observe.
• Urban skyglow severely limits deep-space visibility.
Information Booster:
• Deep-sky objects lie outside the solar system.
• Amateur astronomy is most affected by urban lighting.
• Dark-sky reserves are created to counter light pollution.
Additional Knowledge:
• Sunspots and lunar phases are visible even in cities.
• Planetary transits can be observed with proper instruments.
• Light pollution is a growing concern for observational astronomy.