I feel that "Leading the eye" is the correct answer.
Explanation:
The swirl of the shell leads your eye to the bright yellow center.
Vertical lines: <em>This cant be correct because there are no vertical lines.</em>
Leading the eye: <em>This is likely the correct answer because of what i stated above.</em>
Simple background: <em>There is no background</em>
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I really hope this helps! I took photography class not long ago and <em>loved</em> it, would do it again!
