What is the purpose of a supporting sentence in an example paragraph?

To ameliorate the points made hence increase the probability of getting an accurate answer.

Explanation:

The supporting sentence should be of a help in making an example paragraph comprehensible.

ladies and gentlemen, this message that you will hear is to my family:

dear family, you so much for giving me a possibility to live and i am happy that you took care of me and always telling me that i can do everything that i have in mind, you trusted me and still do it, i don't think i need to ask you for more, i love you.

you so much for listening.

hope this you.

here's your

hope you