Choose the word that makes this sentence true. A quadrilateral is a trapezoid. always sometimes never

A quadrilateral is sometimes a trapezoid. While all trapezoids are quadrilaterals (four-sided shapes), not all quadrilaterals have to be trapezoids. A trapezoid specifically has at least one pair of parallel sides, which doesn't apply to many other types of quadrilaterals, such as rectangles, squares, or other irregular shapes! To dive deeper into geometry, consider how different quadrilaterals fit into the family of polygons. For instance, squares are a special type of rectangle, which in turn are a special type of trapezoid! Isn't it fascinating how shapes relate to one another, much like a family tree in geometry?