Although the state of alaska has more square mileage than any other u. s. state, it is one of the least populated in the country. which is the most probable reason for this

A great question for me to answer I use to live there

Alaska gets extremely cold. and there are alot of dangerous parts that are hard to get to. alot of places in Alaska have to roads you would have to get flown into these parts. also in the summer it stays light 24/7 and in the winter it's always dark, this gets people really depressed.

It’s either c or d as the answer.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.