Someone who gets sick from eating a meal will often develop a strong distaste for the one food in the meal that had the most distinctive flavor, whether or not that food caused the sickness.
Curious Fact
Why are children especially to develop strong aversions to some foods?
Author's Explanation
Because if you get sick from a meal, you'll usually develop a strong distaste for the one food in the meal that had the most distinctive flavor.
Evaluate
This isn't really an argument, so we're not parsing the paragraph into Conclusion / Premise. We just need to justify why the first sentence would be especially likely to impact children.
Goal
Seems like we need to hear that children are more likely to get sick from eating a meal, or that children are more likely than adults to find that one food in the meal has the most distinctive flavor (or both).