Answer the following question given this paragraph: 

Although the hillside is interesting, that's not why this was done. Terracing prevents soil erosion on a hillside that is being farmed. Many techniques can be utilized to reduce soil erosion.


Q: What prevents soil erosion on a hillside that is being farmed?

 Choices:

- slash-and-burn

- irrigation

- no-till farming

- terracing

A:
terracing
