How to answer an Important question
I think the best place to start is the words of St. Peter, “Lord, to whom shall we go? You have the words of eternal life”(John 6:8). Who else has the words of eternal life? The Hindus believe we will be dissolved into their god, the only punishment is reincarnation. The Buddhists believe that we will be dissolved into nothingness, again the only punishment is reincarnation. The Muslims believe that there is only paradise and hell, with no place for those who still have sin on their soul. The Jews have half fulfilled promises. Only Catholicism out of every religion, including other Christians, has the fullness of eternal life.
And if someone asks you why you are Catholic instead of any other Christian group, you can tell them that the belief behind all the other Christian groups is that the Catholic Church is wrong. It is impossible that the Church Jesus founded and promised to be with always went wrong! Here are some Bible verses to support that, Mt. 28:18-20, Mk. 16:15-16, Lk. 24:47-49 Jn. 21:15-19