For the melody, you need to discern the main violin melody, which is the highest part and mostly (but maybe not always) the loudest part in this performance.
PDF template you can use for your response.
Here is the table (PDF) of one-beat stereotypes in compound time. Your dictation responses should be in conventional music notation, not letters, so you don’t need to refer to the table, but you may find it useful, especially if you are having trouble hearing simple 6/8 rhythms accurately and efficiently.
A) melody mp3
B) harmonic progression
(moderato) mp3
C) rhythm 1 mp3
rhythm 2 mp3
rhythm 3 mp3
rhythm 4 mp3
rhythm 5 mp3
rhythm 6 mp3
rhythm 7 mp3
rhythm 8 mp3
rhythm 9 mp3