Really need help on this and dont know the answer

What two important inventions did the people from this region share with society?

How do goods differ from services? (economics)

What was the national government’s biggest concern if facing a war, under the articles of confederation? the national government had no national military. the country had grown too large to defend with a small army. the states would not back the federal government. there was no way the states would pay for fighting a war.