In the following sentence, there is a blank space. Below each such sentence, there are four options with one word each. Fill up the blank with the word that makes the sentence grammatically and contextually correct.
Lessons from the Patacancha Valley are now being ___________to restore Incan agricultural systems in other areas of Peru.

The sentence talks about using lessons from one region to restore agricultural systems elsewhere. The most appropriate word is "employed," which means used or applied—particularly in a practical or purposeful context.Estimated means approximated or guessed—not suitable in the context of applying lessons.Easing refers to making something less severe—not related to restoration or using knowledge.Evoked means to bring a feeling or memory to mind—doesn’t fit here since lessons are being used, not recalled.Escaped means to break free or get away—not relevant to the context.

Lessons from the Patacancha Valley are now being employed to restore Incan agricultural systems in other areas of Peru.