Questions & Answers about Sy studeer politiek.
Because of its job in the sentence.
In Sy studeer politiek, Sy comes before the verb studeer, so it is the subject pronoun and means she.
Afrikaans sy can also mean his, but then it works as a possessive and is followed by a noun, for example:
- sy boek = his book
- sy motor = his car
So in this sentence, Sy must mean she.