Explain how the geography of Canada influenced the laying of the CPR track.

This is when you do research -- at your school library and on the Internet. Google those keywords and you will find lots of information. (And please don't plagiarize!)

Think for 2 minutes. Do railroads just climb directly up over the mountains? Now, you do your own homework.

I see someone else with a future in fast food. Since doing their own homework assignments is too much like work. Particularly EASY stuff like this....and I'm not even Canadian.