Difference between competitive and competing

Test No. [color=blue]incompl/advan-15 “Advertising”, question 6

In order to survive in this business you must adopt a stance.

(a) competition
(b) competing
© competitor
(d) competitive

Test No. [color=blue]incompl/advan-15 “Advertising”, answer 6

In order to survive in this business you must adopt a competitive stance.

Correct answer: (d) competitive

Your answer was: [color=red]incorrect
In order to survive in this business you must adopt a competing stance.
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would yu please tell the difference between "competitive"and “competing”

If you embrace a competitive stance you are ready and willilng to compete with others. You need an adjective here to describe the noun stance.[YSaerTTEW443543]

TOEFL listening discussions: What are the two students doing?[YSaerTTEW443543]