Which of the following are means of cultural communications? gestures, laughter, songs, military symbols, bells, processions, crosses, caps and gowns

Whatever source they have all of the mentioned words can be means of cultural communication and evolution in a date society.

Laughing is the one of these that is a learned behavior and it could be a means of cultural communication. Actually we need to show the babies how to laugh because if they don't see anyone around it doing she couldn't never learn to move the muscles of the face to do a smile