The 2014 zodiac stamps, which are full of traditional culture, are "Success immediately" and "Good luck at Renwu". They use folk toys and traditional calligraphy as patterns respectively.

Analysis of test questions: The 2014 zodiac stamps contain traditional Chinese culture, are novel in shape, and are loved by the public, which shows that culture has a profound and lasting impact on people; zodiac stamps are the material carrier of culture, and the excellent traditional Chinese culture is passed down through stamps. It shows that cultural inheritance is inseparable from material carriers. ②④ The statement is correct; the material does not reflect the relationship between culture and people's social practice, ① is inconsistent with the meaning of the question; excellent culture can promote economic development, while backward and decadent culture will hinder economic development, ③ the statement is wrong. Choose C for this question.