You 4. List the changes that have improved the travelling in modern times.​

Cars

Airplanes

Cycles

etc

Affordable trains soon ruled the forte of long-distance travel. Jet services were introduced that could fly higher and faster. By the time the 2000s rolled around, commercial flights had transformed themselves into the primary option of travel. Now, each member of the family boasts of a car each for personal use.

Explanation:

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the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker