Samuel f. b. morse was responsible for further developing the telegraph and introducing morse code, which utilizes in place of letters.

The answer to this question is dots and dashes.

Explanation:

The answer is dots and dashes because Morse code was created for using dots and dashes to make out words and sentences.

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.