Explain the word efficiency in this context [closed]
Solution 1:
The author means Riga was doing the job directly with the only goal being getting the job done. No care was given to other considerations, like avoiding or ending the deer's suffering.
That is, if reducing the deer's suffering involved any extra action not needed to bind the deer properly: like killing the deer cleanly at the start, then that action would not be done. Not as a matter of wanting the deer to suffer, but simply because the action is superfluous to the task.