Lines and ellipses are p confident in general, but they have a tiny amount of wobble, specially the ellipses.

In these exercises, you should always prioritize confidence over accuracy.

A wobbly line will always be worse than a confident line, no matter how off the confident line is.

If you take a look over the ghosted lines notes you'll see the levels of lines:

Level 1: Line is smooth and consistent without any visible wobbling, but doesn't quite pass through A or B, due to not following the right trajectory. It's a straight shot, but misses the mark a bit.

Level 2: Line is straight, smooth and consistent without any wobbling and maintains the correct trajectory. It does however either fall short or overshoot one or both points.

Level 3: Line is straight, smooth, consistent without any wobbling. It also starts right at one point and ends exactly at the other.

As you can see, wobbly lines aren't mentioned, which means that they would be worse than level 1.

This is the same for ellipses. Remember that in ellipses as well as lines you should try to do them as confident as you can, don't hesitate in sacrificing accuracy to get them smoother and more confident.

For them as well, stick to drawing through them only 2 times, no more. They get messy otherwise.

On boxes, lines get a bit wobbly too, remember as well, confidence > accuracy always, and take the same time you took on ghosted lines in every line you do on boxes.

Don't repeat lines neither, even if they're wrong, keep going as if they were correct.

On organic perspective, I recommend trying more overlaps on organic perspective as well. You can clarify after the overlaps by adding a confident, drawn with the shoulder superimposed line. This line should only be on the parts that overlap, it shouldn't be done in the whole line.