The word being used for its multiple meanings in the pun is "outstanding." It plays on the two meanings of being excellent (won an award) and literally standing out in a field (as a scarecrow does). However, since "outstanding" does not appear in your response options, the more fitting answer would be "field," as it refers both to a physical area (the field where the scarecrow stands) and a metaphorical area of expertise (one's field of work).
So, Field is the answer.