Which photographic technique did the artist use to show movement? Implied
Vertical lines
Leading the eye
Simple background

I think that Leading the eye is the correct answer.

Explanation:

I just answered a question like this, how funny!

The swirl of the shell leads the eye around the photo and makes it feel as if the shell is moving. There is no background, so it is not Simple background, and  there are no vertical lines. I hope this helps, i took photography class and i loved it.

eugene boudin greatly inspired claude monet's art.