How did farming lead to specialization?

What does one prolonged blast and one short blast mean?

6) why do you think the battle of concord was important of the patriot soldiers?

How has the money from oil production in the middle east not impacted the people of that region? a) it improved education and jobs in the region. b) it improved infrastructure such as ports, roads, and bridges. c) it increased life expectancy due to improved healthcare facilities. d) it increased political stability and lessened the presence of corruption.