The sentence " Marta has composed a song" is in present perfect tense. With regards to the question given then correct option is the third one. Actually present perfect tense indicates an action that has been performed in the past but has an unspecified time limit in it. In case of this sentence, we can see that the work has been done in the past but there is no mention of when Martha wrote the song. These kind of sentences always falls in the category of present perfect tense. In this sentence time is of least importance and the most important factor is that Martha wrote the song.
