The grass grew and kept the soil intact. The fence kept the soil contained. The soil was completely gone. The amount of rain decreased.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Several horses grazed in a fenced area across from a home. On rainy days, soil would wash down a slope and run toward the home. After the horses were moved a few years later, the soil no longer washed down when it rained. What could account for this change?
Possibilities:
- The grass grew and kept the soil intact.
- The fence kept the soil contained.
- The soil was completely gone.
- The amount of rain decreased.

The grass grew and kept the soil intact.