Car Skylight
Puzzle 6 of Aquarium Easy Pack
Question is: Car Skylight
and the answer is: SUNROOF
Word Meaning:
SUNROOF — (automotive) A fixed or operable opening in a vehicle roof (car or truck) which allows fresh air and/or light to enter the passenger compartment. A sunroof may include a transparent or opaque panel and may be manually operated or power driven.
Definitions from Wiktionary.