Question
Choose the BEST topic sentence to fill in the blank in the paragraph below.
To build a house on the plains in the nincteenth century, settlers had to use other materials. Some cut blocks out of
the ground to create their homes. These sod houses, found on prairie farms around the turn of the century, were an
adaptation to life on treeless land. Adobe houses in the Southwest still use clay bricks, a similar building method. When
plains farmers wanted to build other structures, wood was rarcly an option. In some parts of the Great Plains. people used
limestone for fencepošts because it was so much more plentiful than wood. And, of course, a scarce commodity like wood
was almost never used for fuel on the plains. Most people built their fires with dried buffalo or cattle dung. These
adaptations to life on the treeless plains reveal the settlers' ingenuity and strength of character
OTrees were a real necessity for early settlers on the Great Plains.
O The scarcity of trees on the Great Plains forced early settlers to make do with very little wood.
OLife on the Great Plains was very difficult for settlers.
O Adobe and sod houses have much in common.
Answer
The scarcity of trees on the Great Plains forced early settlers to make do with very little wood.