melting inside of Earth weathering by wind and water cementing by mud and minerals being pressed between layers of soil
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which action most likely causes large rocks to become smaller pieces of rock?
Possibilities:
- melting inside of Earth
- weathering by wind and water
- cementing by mud and minerals
- being pressed between layers of soil

weathering by wind and water