To speak about teenagers in the world, you need the appropriate vocabulary.
Baby boom - a large increase in the number of babies born among a particular group of people during a particular time;
Recovery - the process of becoming well again after an illness or injury;
Among - in the middle of or surrounded by other things;
Demand - to ask for something forcefully, in a way that shows that you do not expect to be refused;
Consumer - a person who buys goods or services for their own use;
Enter - to come or go into a particular place;
Belief - the feeling of being certain that something exists or is true;
Luxury - great comfort, especially as provided by expensive and beautiful things;
Hairstyle - the style in which someone's hair is cut and arranged;
Latest - newest or most recent or modern;
Gradually - slowly over a period of time or a distance;
Contribute - to give something, especially money, in order to provide or achieve something together with other people.

I demanded an explanation.

Her eyes brightened when she saw him enter the room.

Recent scandals have shaken many people's belief in (= caused people to have doubts about) politicians.

Have you seen her latest movie?