has
The German word 'hat' is the third person singular form of the verb 'haben', which means 'to have'. It is used to express possession or ownership in the present tense. For example, 'Er hat ein Auto.' translates to 'He has a car.' Note that the verb 'haben' is an irregular verb in German, so its conjugation can be tricky to learn.
She has my bag.
In this sentence, 'hat' is used to express possession, referring to the subject 'Sie' (She) owning or having 'meine Tasche' (my bag). 'Hat' is the third person singular form of the German verb 'haben' in present tense.
Who said that?
This sentence is an interrogative sentence inquiring about the subject who performed a specific action. Here, 'hat' is used in conjunction with 'gesagt' to form the past tense of 'say'. This form of sentence is common in spoken and written German.