The indus river valley specialize in creating "seals" for signing contracts and documents

What are the purposes of a political cartoon? check all that apply.

The telegraph, the transatlantic telegraph cable, and the telephone were important to businesses after 1850 because of a. they created a system for developing new inventions. b. they filled a need that other inventions of the day could not. c. they attracted investors and created the stock market. d. they made picture-taking a popular american pastime.

Brainliesttt !me : ) -what is invisible warfare?