Your statement above would be one of many possible answers. Possible questions will be:
1. What causes children in order to become trafficked?
2. That is most the culprit when children are trafficked?
Then start a story to your essay of a young child (real or imagined) that is trafficked by their parents. Next tell the statistics of trafficking of children. End that first paragraph (or it could take 2 paragraphs depending on how information that is much have) with all the question above. The next paragraph should tell a number of the possible answers that other individuals might give, and then inform your answer in a sentence something like this: