who may take parenting responsibilities if biological parents cannot provide care?\n○ grandparents\n○ social…

Brief Explanations:

In cases where biological parents can't provide care, grandparents (family members) are a common group to take on parenting responsibilities, as family ties and traditional family structures often lead to this. Social workers are more in a supportive/assessing role, while family acquaintances and friendly neighbors are less likely compared to grandparents in typical scenarios.

Answer:

A. grandparents