Which of these processes was used to form the word subculture? use a dictionary if necessary.

prefix addition
suffix addition
compounding
telescoping
shortening
back formation

Back formation was used to form the word subculture.

back formation

Explanation:

A subculture is a gathering of individuals inside a culture that separates itself from the parent culture to which it has a place, frequently keeping up a portion of its establishing standards. So to a word with a word subculture, the back development will be the ideal match to interface between them.  

Subculture can likewise be communicated as subsociety, human advancement, culture, life, way of life, society. customs, habits, mores, values. old stories, legacy, inheritance, convention.

Likewise, subculture would remember contrasts for intrigue, practices or convictions, similar to religion, ethnicity, and social or monetary status. So the word that is framed from a previously existing word from which it gives off an impression of being a subordinate, will shape the word subculture.

after the french-indian war.

cultural history is your answer