Why do we have to wait eight months until we're born but we have to wait 12 months until my birthday?

Because we develop inside our mother's uterus for 8 months.

After development, we are given birth and that will mark the day of our existence in the earth. So every 12 months, or a year, we celebrate that moment. :)

like this.

answering: it is all very simple. after you join you find many questions in the main page. you can click on answer if you know, then there will be a box written 'know the answer? add it here'. click on that and start writing your answer. don't copy answers from the net!

questioning: there will be an option for asking questions too. click on 'ask your question'. write your question there and give the correct subject and the number of points.

you will get points when you answer and also lose points when you question. you will get new ranks with many points and brainliest answers.

what effect does exercise have on the nervous system?

the answer is c.