Which of these is true of the Roman road system? 1. Augustus had all Roman roads paved with marble.

2. Improving the roads helped the Roman Empire to grow.

3. The road system provided easy access for enemies to invade Rome.

4. Roman roads were built only during times of peace.

#4 is true

Explanation:

In those years of the Roman Empire, the Roman army needed good roads for the transportation of soldiers, weapons, supplies, and goods. Roman engineers used the technique called "Goma" to build roads in stretched places. They dug ditches on both sides of the road that served as drains. The collected rock from the area and put them in layers until they were heavy enough for the heavy Roman carts. The thing with the Roman roads is that the roads were only built in times of peace.

one of the central themes of edward abbey's work has been his staunch opposition to the glen canyon dam on the colorado river that created lake powell, destroying stunning scenery and wildlife habitat, endangering many rare species of fish and animals, and also irreparably destroying many important archaeological sites which provided information about the early inhabitants of the united states.