你為什麼關心他們？

Why do you care about them?

Source: Tatoeba

Sentence Composition

=1 你 nǐ you (informal, as opposed to courteous 您 nín)
=1 你 nǐ you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
2 為什麼 wèishénme
  1. why?
  2. for what reason?
3 關心 guānxīn to be concerned about; to care about
4 他們 tāmen they; them