These are young fathers, rural farmers, usually growing banana or coffee or subsistence crops.
Hunter-gatherers and subsistence farmers work hard to obtain every calorie they eat.
By that I mean providing education, providing health care, daily living, subsistence and so on.
early 15c., "existence, independence," from Late Latin subsistentia "substance, reality," from Latin subsistens, present participle of subsistere "stand still or firm," from sub "under, up to" (see sub-) + sistere "to assume a standing position," from stare "to stand" (see assist). Properly a loan-translation of Greek hypostasis "subsistence," literally "anything placed under." Meaning "provision of support for animal life" is from 1640s.