Change its to it’s

Delete the comma after days

Insert but after the comma

Change temperatures to temperature

Change a lot to alot

Delete the comma after armadillos

Change so to but

No change is needed.

The landscapes in Texas are mostly deserts and plains because Alaska features

mountains and glaciers.

The landscapes in Texas are, mostly deserts and plains for Alaska features mountains

and glaciers.

The landscapes. Texas are mostly deserts and plains, but Alaska features mountains

and glaciers.

The landscapes in Texas are mostly deserts and plains, but Alaska features mountains

and glaciers.