Refrigerator magnets depicting michelangelo's david and botticelli's venus as jewelry are an example of:

Assuming your options are anime, installation art, vanitas, otaku, and visual culture, the correct answer is definitely visual culture.

Anime refers to Japanese cartoons; installation art is on a much grander scale; vanitas are usually large paintings; otaku is a Japanese term which basically means a nerd - this leaves us with visual culture as the correct answer. It refers to culture expressed in visual terms.