The himalayas are a landform that developed due to
a. tectonic activity.
b. the weathering of surface material.
c. deposition of sediment by water, wind, or ice.

A. Tectonic activity
Mountain ranges, fault lines, volcanoes and earthquakes are all produced by the activity of tectonic plates.

The study of where things are 

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!