Final answer:
Brian Wilson created the influential theme album 'Pet Sounds' in 1966 during a time when albums typically consisted of unrelated singles.
Step-by-step explanation:
In 1966, Brian Wilson, temporarily sidelined by a nervous breakdown, channeled his songwriting talent into creating an influential theme album.
This album stood out in a market that was used to collections of single, unrelated songs. The album Brian Wilson produced is (b) "Pet Sounds", by The Beach Boys.
"Pet Sounds" is revered for its intricate harmonies, innovative production, and emotional depth, making it a milestone in the transition from pop-oriented albums to more cohesive, conceptual works.