29. Meridians are lines that run a. in and out b. east and west \( \begin{array}{ll}\text { c. around and under } \\ \text { 30. bridge } & \text { d. north and south } \\ \text { a. disaster } & \text { c. barrier } \\ \text { 31. The value of a graph is determined by its } \\ \text { a. color } & \text { c. size } \\ \text { b. usefulness } & \text { d. weight }\end{array} \)

Let's analyze the questions one by one. ### Question 29: Meridians are lines that run - a. in and out - b. east and west - c. around and under - d. north and south **Solution:** Meridians are lines of longitude that run from the North Pole to the South Pole. Therefore, the correct answer is: - **d. north and south** ### Question 30: bridge - a. disaster - b. usefulness - c. barrier **Solution:** The word "bridge" can be associated with the concept of connecting two sides or overcoming an obstacle. The most fitting synonym in this context is: - **c. barrier** (as a bridge can act as a barrier to water or land). ### Question 31: The value of a graph is determined by its - a. color - b. usefulness - c. size - d. weight **Solution:** The value of a graph is primarily determined by how effectively it conveys information and serves its purpose. Therefore, the best answer is: - **b. usefulness** ### Summary of Answers: - **29:** d. north and south - **30:** c. barrier - **31:** b. usefulness