Let's go back to the source to find the right answers.
You find yourself standing in a dark space, the Waiting Room, but unlike being in a darkened room, you can see everything around you and the blackness has dimension. There is another person standing to your right, and like you, he is waiting to be born into the physical world. There is a being of white light who is answering questions. In front of us, and a few degrees below us, you can see the Earth with the facial images of two couples.
You ask who those people are whose images appear on the Earth and the light replies that they were going to be your parents. The light said that it was time to go. The other one standing next to you walks forward and disappears from your sight. You take your turn. You hear sounds of wind rushing as you enter the development environment of your Mother's Womb. Eventually, you find yourself looking up at what are your parents: mother, father, and baby together at last. They raise you up and soon you begin to forget about The Waiting Room. Over time questions begin to emerge.
Around the age of three --
"Mother?", you ask. "Yes?", she responds. "Why are we here?", you ask.
Her answer doesn't satisfy you and more questions come. Soon, depending on the parents you have, you may be given a religious and/or political system to follow. If your parents did not indoctrinate you into their system, you have may found your way by asking more ... questions.