What is berka?

I am not sure what you are referring to specifically by "berka." However, if you are referring to "Burka," it is a type of full-body covering garment worn by some Muslim women, typically in conservative Islamic societies. The burka covers the entire body, including the face and hands, with a mesh screen to see through. It is commonly worn in countries such as Afghanistan, Pakistan, and Saudi Arabia as a form of modesty and religious adherence. It is important to note that not all Muslim women wear the burka, and its usage varies greatly depending on cultural and religious practices.