sand blowing into cracks leaves pressing down tightly ice breaking large rocks apart shells and bones sticking together
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A student climbs up a rocky mountain trail in Maine. She sees many small pieces of rock on the path. Which action most likely made the small pieces of rock?
Possibilities:
- sand blowing into cracks
- leaves pressing down tightly
- ice breaking large rocks apart
- shells and bones sticking together

ice breaking large rocks apart