Ma is only used when it's a yes/no question

什么 implies a question so there's no need for a second question marker.

The 'what' 什么 makes it a question

ma is for yes/no questions

Ma, is for simple yes/no questions.

Shen me already makes the sentence a question, so ma is unnecessary.

When the sentence has a question word in it, you don't add ma at the end.

Because (1) you already have 什么 as a question word in the sentence, and because (2) 吗 is only for questions that can be answered with 'yes' or 'no', which is not the case here.

Thw use of " She ma" Indicates that the sentence is a question, so ma isnt necessary.

什么 (shénme, what/which) is the question particle, so there shouldn't also be 吗

吗 is used to indicate a yes/no question formed from a statement, sort of like adding Do...? To a statement in English. E.g. You like cake. = 你喜欢蛋糕. Do you like cake? = 你喜欢蛋糕吗。

Because it requires an answer with "yes" or "no". In this case, the answer is a name of a sport.

Because ma refers to a yes or no question as far as I know.