Theorie:

To speak about teens’ behaviour in the society, you need the appropriate vocabulary.
 
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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.