Hi Sam,
Both Western Cordillera (WC) and the Interior Plains (IP) are located in Canada. We can find additional similarities by researching precipitation patterns, climate, and vegetation.
Both have Lack of Precipitation:
IP: There is lack of precipitation (and regions of permafrost) above the tree-line.
WC: There is lack of precipitation in the southern regions of Western Cordillera.
Both have extreme climates:
IP: The climate is diverse. While the North is Tundra (treeless area where the ground is always frozen), the South is deciduous and evergreen trees.
WC: The climate is diverse. There is a wide range of climates depending on where you are located in the mountains. The shorelines are cool, while the upper part of the mountains is very cold, and the inland areas experience heavy snowfall.
Both have regions of no trees and regions of coniferous trees:
IP: While there are no trees in the tundra due to extreme cold, there are small and stunted conifers near the Rocky Mountains in the sub-alpine area.
WC: While there are no trees above tree-line (in the mountains) due to extreme cold, the lower parts of the mountains are scattered with coniferous trees such as pine trees.
Other elements to consider when comparing the regions include population density, farming & mining, wildlife, etc.
Best,
Star
