Family Relationship - Crisis/Issue(s) they face
Aboriginal and Torres Strait Islander peoples’ customary law marriages - Not recognised as formal marriages due to non-compliance to definition of marriage.
Single parent families - Failure to pay maintenance, discrimination (pretty much solved by various Anti-discrimination Acts) and residential and contact agreements.
Same sex relationships - Recognition of same-sex marriage (achieved through a list of cases and legislations), maybe the trend to legalise gay marriages.
Polygamous marriages - Not recognised in Australia, only the first spouse is legally recognised, the rest can be considered as de factos
De facto relationships - Recognition of de facto relationship (refer back to a list of legislations again)
Children and their parents - Care and protection, new technology to reproduction (i.e. AI and invitro and problems these might have).
These are pretty brief try to look them up on your textbook.