What is a common feature of 'kitsch' art?

Kitsch art is characterized by its overly sentimental nature and mass production. This style often appeals to popular taste, focusing on clichés and superficial emotional appeals rather than depth or sophistication. It is frequently recognized for its lack of originality and its appeal to a broad audience, emphasizing accessibility over artistic merit. This common feature leads to a work that can often be viewed as lacking in critical acclaim yet is embraced by many for its unabashed embrace of sentimentality and kitsch aesthetics.

The other options, while related to different aspects of art, do not align well with the concept of kitsch. Kitsch does not generally receive respect or appreciation in the same way as high art, nor does it typically explore avant-garde techniques or represent complex themes in a subtle manner. Instead, its humor and charm often stem from its straightforwardness and overt emotionality.