1- What is the ruling regarding a girl who learned Taekwondo?

Practicing sports is a legitimate right for both men and women, as long as it does not transgress the limits of Islamic law, such as a woman appearing immodestly before men, or neglecting the rights of her husband and children due to sports, or if the sport is one specifically designated for men, like a game that relies on numerous and powerful movements. This falls under the category of women imitating men, concerning which the hadith of Ibn Abbas states: "The Messenger of Allah (peace and blessings of Allah be upon him) cursed men who imitate women and women who imitate men" (narrated by Al-Bukhari). It is more appropriate for a woman not to practice any sport beyond what is sufficient for her to fulfill her daily duties, such as walking and jogging within their Islamic legal parameters, bearing in mind that violent sports may cause a woman to lose her femininity.