Question

which invention in the mid-1800s made communication more efficient by making it easier and faster to communicate over long distances? steam-locomotive (train0) telegraph airplane steam-boat

Explanation:

The steam-locomotive and steam-boat were mid-1800s inventions for transportation, not communication. The airplane was invented in the early 1900s, not the mid-1800s. The telegraph, developed in the mid-1800s, enabled fast long-distance electrical communication.

Answer:

telegraph