What is a government?

Can someone me with these 2 questions? and tell me why it is the correct answer?

Why does russell argue that police departments need to be partners in communities? what responsibility does the community have in this relationship?

How did the percentage of americans living on farms change between 1820 and 1850 a. it lowered as many americans were sold into slavery b. it rated the same as people stopped coming to america c. it grew as more people came to america d. it lowered as many americans went to work in factories