I'm Lucy. I have a happy family. There are four people in my family. My birthday is on January 1st. It's New Year's Day, too. My family and I will have a big dinner on that day. I have a little brother. He is four years old. His birthday is in winter. It's very cold but we can make a snowman. My mother's birthday is in March. My father's birthday is in March，too. We can plant trees and fly kites.

根据调查结果绘制出了如下两幅尚不完整的统计图．

根据以上信息解答下列问题：

下图为“某大洋海岸大陆等高线地形图”，左图为丙区域的放大图，其中实线为等高线（单位：米），虚线为地层界线。读图答题。

若丙地区终年受西风控制，则关于甲、乙两河的叙述，正确的是(     )

在设计对照组实验时要充分考虑变量因素，下列各项，能形成对照关系的一组是（　　）