Reciprocity is 'the condition of being reciprocal'. It's doing something in return, mutual actions, give and take, inversely correspondent, complementary.
After I plant flower seeds, they reciprocate by blooming. This act of reciprocation is then follwed by another – bees visit to collect food, pollinate my plants and continue a recrocating cycle.
Have you ever behaved reciprocally?
If you win the £16,000 first prize, or even one of the three £8,000 awards for this free to enter playwriting competition, as a result of seeing it here, I hope you'll reciprocate my kindness in posting about it by buying me a cake. A big one. With a cherry on top.
p.s. I have a new collection of short stories out. Family Feeling is currently on sale for the reduced price of 99p (99c)