Question

Homesteaders on the great plains often had to make their homes out of

A- Tree bark
B- sod
C- brick
D- Stone

Answer 1

they used sods since there was no wood 

Answer 2

the answer is: B. Sod.
They cannot find many woord on great plains, so they use grass and the part of the soil beneath it which is held together by its roots a replacement for the woods.
Up to this day, sod is still widely used by people and you can see it on man-made golf or soccer field.