Final answer:
The compare-and-contrast structure emphasizes the differences in the family members' feelings about vacationing.
Step-by-step explanation:
The statement that best describes how text structure contributes to the development of ideas in this passage is D. The compare-and-contrast structure emphasizes the differences in the family members' feelings about vacationing. The passage presents the conflict between the family members' preferences for beach vacations and mountain vacations, highlighting the contrasting viewpoints and preferences of each family member. The compare-and-contrast structure helps to organize and highlight these differences, allowing the reader to understand the different perspectives and preferences within the family.