- Acid can cause rocks to weather by chemical reaction
- Soil is formed by rocks weathering
- So, acid can form soil by weathering rocks

- Acid can form soil by weathering rocks
- Plants can produce acid
- Therefore, plants can form soil by producing acid to weather rocks

Therefore, plants can form soil by producing acid to weather rocks
Question: Before rock can become soil, it must undergo certain processes. One process in the formation of soil involves plants. How can plants chemically change rocks into soil?
Context: - Plants can produce acid 
- Acid can cause rocks to weather by chemical reaction 
- Soil is formed by rocks weathering