Final answer:
Henri, having bought albums by Whitney Houston, Janet Jackson, and George Michael, is likely a fan of the 1980s pop music era, as these artists were at the height of their fame during that time with iconic albums.
Step-by-step explanation:
Based on Henri's purchases of albums by Whitney Houston, Janet Jackson, and George Michael, it's most likely that Henri is a fan of the 1980s pop music era. These artists were at the peak of their popularity during that decade, with numerous hits that defined the pop music scene of the time. Whitney Houston's debut album was released in 1985, Janet Jackson's breakthrough album, 'Control', came out in 1986, and George Michael's debut solo album, 'Faith', was released in 1987. Each of these albums had a significant impact on the music of the era and continue to be celebrated as classic examples of 80s pop.