Yes it does answer the question.
Process making the changes generates the log records and puts them into the log buffer (logs the changes). Log writer writes the log records to disk before the transaction commits or data pages are written to disk (hardens the log records)
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability