I failed and need your advice

These are my scores. I’m confused by my essay scores. I felt I did equally well for the essay 1-3 and 5, worse for 4, and worst for 6. But why 1 is so high and 2-3 are so low? How should I do to improve? Should I try F25 or J25?

These are my scores. I’m confused by my essay scores. I felt I did equally well for the essay 1-3 and 5, worse for 4, and worst for 6. But why 1 is so high and 2-3 are so low? How should I do to improve? Should I try F25 or J25?