Back in the spring of 1955 a teenage girl named Claudette Colvin and an elderly woman refused to give up their seats in the middle section of a bus to white people. When the driver went to get the police, the elderly woman got off the bus, but Claudette refused to leave, saying she had already paid her dime and had no reason to move. When the police came, they dragged her from the bus and arrested her.

The author uses a chronological text structure in this excerpt because it
gives readers a clear picture of the sequence of events.

Back in the spring of 1955 a teenage girl named Claudette Colvin and an elderly woman refused to give up their seats in the middle section of a bus to white people. When the driver went to get the police, the elderly woman got off the bus, but Claudette refused to leave, saying she had already paid her dime and had no reason to move. When the police came, they dragged her from the bus and arrested her.

The author uses a chronological text structure in this excerpt because it  gives readers a clear picture of the sequence of events in order to make the readers to understand what happened on that day.

Chronological order is the order in which things happen,when the story is arranged in order of occurrence, in other words,chronological texts organize events in the order they happened  and It is also called time order.This particular text structure is common in current events, history etc.

An example of chronological text structure is a biography that starts in 1761 and goes through 1800.