To speak about teens’ behaviour in the society, you need the appropriate vocabulary.
Cause - the reason why something, especially something bad, happens;
Education - the process of teaching or learning, especially in a school or college, or the knowledge that you get from this;
Wimp - a person who is not strong, brave, or confident;
Assure - to tell someone confidently that something is true, especially so that they do not worry;
Reduce - to become or to make something become smaller in size, amount, degree, importance, etc;
Mate - a friend;
Turn up - happen or become available unexpectedly or in a way that was not planned;
Pretend - to behave as if something is true when you know that it is not, especially in order to deceive people or as a game;
Equal - the same in importance and deserving the same treatment;
Irritating - making you feel annoyed;
Shout - to speak with a very loud voice, often as loud as possible, usually when you want to make yourself heard in noisy situations, or when the person you are talking to is a long way away or cannot hear very well;
Confident - having confidence;
Decent - socially acceptable or good;
Psychology - the scientific study of the way the human mind works and how it influences behaviour, or the influence of a particular person's character on their behaviour.
Examples:
I'm afraid I'm a wimp when it comes to climbing up ladders.
The unions assured the new owners of the workers' loyalty to the company.
I reduced the problem to a few simple questions.
Don't worry about it - something will turn up, you'll see.