The first option which is alternate interior angles is the correct answer
What are alternate interior angles?
Alternate angles is a term used in geometry to refer to angles formed when two parallel lines intersect by a transversal line. When this angles are formed in formed inside the two parallel lines they two angles are said to be alternate interior angles.
The description given in the question describes alternate interior angles hence we can say that the angle relationship describes angles BCE and CED is that they are alternate interior angles.
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