What is the main characteristic of the East lines in the North half of Section 6?

The main characteristic of the East lines in the North half of Section 6 is that they run parallel to the East boundary. This is a key feature of land survey practices, particularly in the rectangular survey system commonly used in the United States, including Oklahoma. When sections are divided, the East and West lines are established to maintain consistency in property dimensions and orientation.

In this context, the East lines will align parallel to the East boundary line of the section, ensuring that property lines remain straight and uniform. This parallelism aids in maintaining the geometric order of the land, which is crucial for surveying and mapping purposes.

The other choices presented involve aspects that either describe incorrect relationships of lines or do not accurately represent the characteristics dictated by land survey principles. For example, while the East lines do indeed interact with various aspects of the section, their primary defining characteristic in the context of this question is their parallel alignment to the East boundary.