Question

the evolution of communication technology
communication technology is any tool people use to create, transmit, store, and share information.
after watching the video \timeline: the evolution of communication technology\ (https://www.youtube.com/watch?v=nakul2j - r_j), complete the following chart.
what are the 5 most important inventions in the evolution of communication technology so far?

name and date of invention:	definition / explanation of this tool:	how did this invention help to advance communication?
smoke signal
pigeons
pony express
semaphore flag
radio telephone

Explanation:

Smoke Signal: Ancient - A visual signal made by fire, used to send simple messages over long - distance in open areas. It advanced communication by allowing basic information transfer across large spaces.
Pigeons: Historical - Trained birds used to carry small messages. They enabled personal and some official messages to be sent over moderate distances.
Pony Express: 1860 - 1861 in the US - A mail service using riders on horses. It sped up long - distance land communication in the pre - telegraph era.
Semaphore Flag: 18th - 19th century - A visual signaling system using flags. It allowed for more complex messages to be sent over line - of - sight distances.
Radio Telephone: 20th century - A device for voice communication over radio waves. It revolutionized communication by enabling wireless long - distance voice transmission.

Answer:

Smoke Signal: Ancient, A visual signal made by fire, Allowed basic long - distance information transfer.
Pigeons: Historical, Trained birds for message - carrying, Enabled personal/official message transfer over moderate distances.
Pony Express: 1860 - 1861, A mail service with horse riders, Sped up long - distance land communication pre - telegraph.
Semaphore Flag: 18th - 19th century, A visual signaling system with flags, Allowed more complex line - of - sight message transfer.
Radio Telephone: 20th century, A device for voice communication via radio waves, Enabled wireless long - distance voice transmission.