The document provides information about different martial arts including karate, taekwondo, kung fu, and krav maga. It describes the origins and key principles of karate, which began in Okinawa and focuses on self-improvement. Karate practice involves kihon (basics), kata (forms against imaginary opponents), and kumite (sparring). The founder of modern karate was Gichin Funakoshi. Taekwondo originated in Korea and is an Olympic sport, while kung fu began over 4000 years ago in China. Krav maga was developed from techniques in boxing, judo, and wrestling for realistic self-defense on the street.