Thank I get it now !

Mud huts means building built by mud(A clay/ a substance under the land. it is wet and thick ) In old ages human lived in this types of houses

Metaphorically, it means living in poor conditions (shanty-town, slum etc...). A mud hut, as the name suggests, is built using mud, some sticks, grass or stones may also be used. These types of hut are found in some of the worlds poorest countries and originated in Africa. Mostly, people live in mud huts because they are poor.

Depending on context, 'living in mud huts' didactically means living in a structure comprised of clay, mud, or an earth-like substance. In a metaphorical context, 'living in mud huts' is used to describe challenging or austere living conditions.