What method of communication became extremely important by the end of the nineteenth century because of its use in coordinating rail travel?

Telegraph

Explanation: Telegraph was a device that was discovered in 1844 for the long distance communication. This device functioned by transmitting a message through electrical signal from source to destination and then receive back a message as a response.

Telegraph operator ,also known as telegrapher was the main worker for operating and processing the task of telegraphy in the field of rail . Morse code were used for creating the message communication for maintaining the coordination rail field.

a.. a conflict between her competing identities.. apex

manifest functions are the recognized and intended consequences of any social pattern, while latent functions are those unrecognized and unintended consequences. to analyze the manifest functions of any social institution, we have to study its contribution to the continuation of a group, community, or society.