Respuesta :

The sustative we are looking for here is ‘’enhancement’’. Indeed, by enhancing an assigned duty one can turn it into a more rewarding, motivating and satisfying job. To enhance something means succeeding at intending to improve it anyhow. That is the reason why, by enhancing a task, you can turn it into a more rewarding activity (and the same goes, certainly, for motivation and satisfaction).
In order to help the student expand his/her knowledge I will help answer the question. This in hope that the student will get a piece of knowledge that will help him/her through his/her homework or future tests.

  Enrichment refers to changing a task to make it inherently more rewarding, motivating and satisfying. The correct choice is the last option. That is the best word that pretty much gives this meaning.  

Enrichment    

I hope it helps, Regards.