The answer would be #3
Due to lack of trees to use for building a cabin, many of the prairie homes were made of sod.
The correct answer is letter D
A Turning Point is a particular time or incident that marks the beginning of a completely new stage in someone's life or in the development of something.
This turning point is always used to refer to major historical changes, such as the end of certain eras for the beginning of a new era, such as the middle and modern ages, in this turning point there were major changes in society.
Causation I think if I have the right meaning
