Fact 1: If soil is permeable then water easily flows through that soil.

Fact 2: If a soil has high permeability, water flows through the soil more freely and may cause chemicals to leach.

Given the two facts above, answer the question "What may cause chemicals to leach in soil?" with the following options: 
- soil is permeable
 - Pesticides
 - soil is hard
 - soil is dense
 - soil is eroded
 - Organic compounds
 - fossil fuels
 - harmful substances


 

 soil is permeable        