He ability to dam water and the use of improved transportation are examples of how . A. technology can be used to overcome physical barriers and boundaries
B. technology can be used to overcome political issues
C. governments can prevent the growth of countries with large populations
D. governments can encourage all states to work together

A. technology can be used to overcome physical barriers and boundaries

Explanation:

The ability to dam water and use of improved transportation are clear proofs of how we can overcome physical barriers and boundaries.

Dam water is an engineering revolution by which water can be made available all year round. Also, damage to the ecosystem caused by excess water is circumvented. Roads that are pliable are of huge important in breaching geographical imitations. A good transport system can make use of this connectivity. Air transportation has improved the ease of travel and reduced travel time greatly. Both dams and good transportation are clear engineering solutions to overcome limitations of nature.

Europeans are more concentrated in urban areas.