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Answer 1

Answer:

1.Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes or dits and dahs.

2.Common communication channels in mass communication include television, radio, social media, and print media. Examples of mass communication include commercial advertising, public relations, journalism, and political campaigning.

3.A mobile phone, cellular phone, cell phone, cellphone, or hand phone, sometimes shortened to simply mobile, cell or just phone, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.

4.A post office is a public department that provides a customer service to the public and handles their mail needs. Post offices offer mail-related services such as acceptance of letters and parcels; provision of post office boxes; and sale of postage stamps, packaging, and stationery.

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