which came first the chicken or the egg?

Egg, as eggs existed way long before the chicken species developed

I hope you are old enough to have tackled on this subject. Logic will tell us that the chickens must have come first before the eggs did. After the female got fertilized by the male one, she had layed an egg a day. After having completed the egg-laying, she will have to keep the eggs warm through her body heat. After 21 days or so of having received the hen's body heat, the eggs hatched and yield chicks. The chicks will not survive if the mother hen will not teach them as regards feeding, nor will they survive if the mother hen will not shelter them from harm which they may encounter from time to time, nor will they survive if the mother hen will not keep them warm as she keeps them underneath her wings each night. It is just a matte of common sense that the chickens came first.

simple answer my friend, the answer is "chicken"! why? because you said first word of question is "chicken".