As ever, with an essay at this level, itโs always a game of two halves:
Introduction - you can mention the idea of New Right thinking on the matter. You should also take the opportunity to discuss the idea of a โsocial problemโ (to whom is it a problem and why? For example) - one paragraph
Arguments and evidence that support the idea single parent families are a social problem.
Perhaps 2 or 3 paragraphs
Arguments and evidence against the idea they are problematic family structures.
2 or 3 paragraphs?
Conclusion - sum-up the evidence for and against and draw an overall conclusion.
1 paragraph
Fit the material youโve identified into this structure (eg poverty arguments - itโs not family structure at fault etc. - would fit neatly into the โArguments againstโ section).
If material doesnโt fit, then you probably need to discard it because you wonโt be focusing on the question.