Which statement best describes the text structure of this sentence and explains why it is used?

A cause-and-effect text structure is used to show the relationship between Walter and Vida Hayter.
A sequence text structure is used to describe an order of events in Walter and Vida Hayter's life.
A compare-and-contrast text structure is used to show how Walter Hayter is different from Vida Hayter.
A cause-and-effect text structure is used to explain why Walter and Vida Hayter sailed to the United States.