In general places farther from the equator have colder winters and sometimes hotter summers with lower average year-round temperatures. but there are many other influences on climate besides latitude such as elevation rainfall and proximity to or distance from large bodies of water.
National park's are meant to be a safe place for animals and nature where they can't be harmed or pursued for human use. The second question depends on your point of view but the natural environment does need to be protected.
Canada and Mexico . are the two countries
