Who invented the telephone in 1870?

The invention of the telephone in 1870 is attributed to Alexander Graham Bell, making this choice the correct answer. Bell was a Scottish-born inventor and scientist who is widely recognized for his contributions to communication technology. His work was focused on the transmission of voice over wires, and he successfully patented his design for the telephone in 1876, ultimately leading to the development of telecommunication as we understand it today.

Other individuals mentioned, such as Thomas Edison, are significant innovators in their own right but are not credited with the invention of the telephone specifically. Edison is known for many inventions, including the phonograph and improvements to the light bulb, but not the telephone. Similarly, while Bell’s brother did not contribute to the invention of the telephone, Helen Keller, known for her advocacy for people with disabilities, did not have any involvement in telecommunication inventions. The choice of Alexander Graham Bell emphasizes his pivotal role in the advancement of communication methods during that period.