Please select the word from the list that best fits the definition The exchange of one good for another.

Which of the following is one of the innovations that neolithic farmers become more productive? a) plow b) windmill c) tractor d) reaper

The physical feature that makes up part of the border between canada and the united states is the

Which of the following is an executive check on the powers of the judicial branch of government? a. presides over senate during hearing to impeach the president b. enforces term limits for supreme court justices c. nominates supreme court justices and federal judges d. casts tie-breaking vote if the supreme court cannot reach a verdict