Answer:
Ten common features of festivals are:
- A certain culture or religion that's the theme of the festival.
- Agricultural food.
- Music. Especially a certain type of music that is native to the area.
- Artwork for a festival.
- Offerings for the festival, especially if there is an important someone that is represents the festival.
- Feasts with agricultural food.
- A certain type of dress code for the culture of the festival.
- Festivals for the seasons.
- Another common feature is merchandise. You can usually buy things at festivals.
- The last common feature I can think of is trading. There can be trading for festivals.