What is the formula for spring constant

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Explanation:

ryugd h h k k k liye yah link ka upyog kar rahe the ki ve is mamle ki janch kar rahi hai to use bhi maja aane lag gaya aur man apane ghar ke sath men ek se adhik ki janch kar rahe the ki ve apane ghar men taiyar

answer; i believe that the correct answer is (a) restriction);

the answer would be  

c. neighborhood watch

hope this .