The whole family depends on him alone for support.
Tips
mistakes
Two readings, two different words. This one is gōngyǎng, where 供 means to supply, so it is about keeping a person fed and housed. Read gòngyǎng, 供养 is a different word meaning to make offerings to gods or ancestors.
usage
Points upward in the family: children 供养 their parents. The legal term for that duty is 赡养, while raising children downward is 抚养.