Lithuanian and Belarusian self-defence means that people from Lithuania and Belarus are learning how to protect themselves and stay safe if someone tries to hurt them or take something from them.
Just like how you might learn how to tie your shoes or ride a bike, Lithuanians and Belarusians are learning skills to keep themselves safe and protect their families and communities. They learn things like how to use their body to defend themselves, how to be aware of their surroundings, and how to avoid dangerous situations.
These skills are important because unfortunately, sometimes there are people who might want to hurt others or take things that don't belong to them. By learning how to defend themselves, people from Lithuania and Belarus are able to feel more confident and keep themselves safe from those who might mean them harm.