Starting with your arrows, very nice work - you're drawing your initial linework with a lot of confidence here, which really helps to achieve a smooth, fluid sense of how they're pushing through all three dimensions of space. This is a little undermined by the more hesitant strokes you add when attempting to add line weight. In truth, line weight shouldn't be applied to such long sections - rather, its best use is in clarifying how different forms overlap one another, and should be limited to the localized areas in which those overlaps occur as shown here. In the case of your arrows, that's going to be focused primarily on the zigzagging sections, and anywhere else the lines from different parts of the form cross one another.

The confidence in that initial linework does carry over fairly well into your leaves, where you're not only capturing how they sit statically in 3D space, but also how they move through the space they occupy. You're also doing very well in terms of building up edge detail and tackling more complex leaf structures made up of more individual pieces - except for one spot. On this leaf it seems that you may have been a little less careful in the addition of those little protrusions along the leaf's edge, and so they're really just a few little specks - individual marks that do not actually alter the silhouette of the form. Be sure to actually draw complete marks and avoid arbitrary gaps in your silhouettes. You've done this far better in the other cases where you've added edge detail.

Moving onto your branches, your work here is mostly well done - just be sure to extend your edge segments fully half-way to the next ellipse. Right now they're generally falling quite short of that, which limits the overlap we achieve between the segments. As shown here, that overlap helps us achieve a smoother, more seamless transition from segment to segment.

Lastly, going through your plant constructions, you hold well to the pattern thus far - you're applying the instructions fairly closely, and as a result, your constructions are coming along well. You're focusing a lot on the fluidity of your petals and leaves, you're building up your constructions in a step by step manner, avoiding adding more complexity than can be supported by what's already present, and so on. The only thing that really caught my eye is something I already mentioned - on this hibiscus, tone down the use of line weight and focus it on the areas where overlaps occur, rather than tracing back over everything. Your use of line weight elsewhere (or rather, the fact that you didn't overdo it) is definitely much better.

As a whole, you're doing great. I'll go ahead and mark this lesson as complete, so keep up the good work.