Final answer:
Jem's defiance of Atticus's order to leave makes him similar to Atticus in Scout's estimation because both characters display courage and a strong sense of justice.
Step-by-step explanation:
In the book To Kill a Mockingbird, Scout's brother Jem defies Atticus's order to leave during Atticus's confrontation with a group of men at the jail. This act of defiance makes Jem similar to Atticus in Scout's estimation because both characters display courage and a strong sense of justice.
Atticus, as a lawyer, defends Tom Robinson, an innocent black man accused of a crime. Atticus is willing to stand up against the ingrained racism and prejudice of the town, even though he knows it will be a difficult and unpopular task.
Similarly, Jem's defiance shows his sense of justice and unwillingness to back down from what he believes is right. Both characters are willing to challenge the status quo and fight for what they believe in, which earns Scout's admiration.