Match the improvement with its influence on distribution and travel. match the items in the left column to the items in the right column.

1. crushed rock roads
2. steam locomotives
3. canals
4. steamboats

a. made land travel quicker, safer, more enjoyable
b. made distribution cheaper and easier, eliminated delays between water routes
c. quickened distribution, lowered transportation costs on water
d. made distribution quicker, cheaper, and easier on land.

The answers are:

1. crushed rock roads -- a) made land travel quicker, safer, more enjoyable

2. steam locomotives -- d) made distribution quicker, cheaper, and easier on land.

3. canals --b) made distribution cheaper and easier, eliminated delays between water routes

4. steamboats --c) quickened distribution, lowered transportation costs on water

Explanation:

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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