Wish, want, need, lack, miss -- are fuzzy points on a sliding scale of semantics

Yes, the sentence lacks accuracy, which assumes definition-wise instead of meaning-wise.

Most of the time, 要 means to want.

叉子 only means fork, while 叉 can also mean "a cross" or "X" (as in "mark the wrong answers with a cross/ X) or the action of crossing / intersecting.

谁 marks the question.

Yes, it depends on context