Your main idea is 1) eating habits differ widely from one culture to another. All the other choices give examples of the different cultures.
A synthesis<span> is a written discussion that draws on one or more sources. It follows that your ability to write syntheses depends on your ability to infer relationships among sources - essays, articles, fiction, and also nonwritten sources, such as lectures, interviews, observations.</span>
What parts do you need help with?
I would go with B, I do not for sure know the answer but that is the one that seems to make the most sense
