For such people to be able to provide for their families and fend for themselves, they have to work hard.

fend 是动词，意思是"照料、照顾"，常与介词 for 搭配使用。 for 是介词，在这里表示"为了...的利益"或"替...着想"。 themselves 是反身代词，指代前面提到的"such people"（这些人自己）。 fend for themselves 是一个固定短语，意思是"自谋生计、独立生活"，指不依赖他人而靠自己努力生存。