Is the lack of communication among the children of maternal aunts who live in the same town, and their unwillingness to visit, as well as the lack of communication from the paternal uncle's daughter who used to live in the same house and her cessation of responding, considered a severance of kinship ties?

Maintaining kinship ties is obligatory, and severing them is forbidden. The obligatory aspect specifically applies to mahrams (unmarriageable kin), such as brothers, sisters, paternal uncles, paternal aunts, maternal uncles, and maternal aunts. As for maintaining ties with non-mahrams—like the children of paternal uncles and maternal uncles—it is recommended, not obligatory. Maintaining kinship ties is achieved through whatever is customarily considered a connection: through financial support, fulfilling needs, visiting, writing, exchanging greetings, and similar acts, while being careful to avoid prohibited actions and temptation.