The provided text contains excerpts from the Texas Penal Code, Chapter 9, which outlines the various circumstances under which certain conduct is legally justified and therefore excludes criminal responsibility. This chapter begins by providing key definitions, such as "deadly force," and establishes that justification is a defense to prosecution. The statutes detail general principles of justification, including acting under a public duty and necessity, and then specify justified uses of force in several contexts. These contexts include the protection of persons (self-defense, defense of a third person, and protection of life or health), protection of property (one's own or a third person's), and actions taken for law enforcement purposes, including arrest, search, and maintaining security in correctional facilities. Finally, the chapter addresses the use of force within special relationships, such as parent-child, educator-student, and guardian-incompetent, limiting the justification in those cases to the use of force but not deadly force.