How do authors organize information in a science article to show how events are related?

Chronologically. They usually tend to organize information into groups of events that took place at a similar time. Oldest to most recent events, perhaps with slight reflections and differences here and there.

I hope this is the answer you were looking for.

the values of the selma marchers was to bring   their ability to vote into law. mlk was not hat march, which was protesting toward lbj