4. What is one ENVIRONMENTAL impact of the use of pesticides in farming?
Runoff may introduce pesticides to the surrounding environments
High levels of pesticides on food may make people sick
Pesticide use contributes to climate change

Migration people get up and go cause they feel it is best for them 

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.