Student or Learner
The quote below is from google dictionary. Could anyone please explain why use "in which" in the sentence?
"Attrition is a process in which you steadily reduce the strength of an enemy by continually attacking them."
The phrase “In which” is a combination of a preposition (in) and a relative pronoun (which). So you can use “in which” as a precise way to introduce a relative clause after a noun that needs further description or additional information.. Here the relative clause introduced by the phrase describes the process called ‘Attrition’