What kind of line is line A.F?
A) Parallel
B) Perpendicular
C) Segment
D) Transversal

A transversal is a line that intersects or crosses two lines at two different locations
The correct option that gives the kind of line, line A_F is is option D
D. Transversal
The reason why the selected option is correct is given as follows:
The description of the given diagram is as follows;
Lines L, and M, are horizontal lines, both extending in apparently the same direction
Line A_F crosses both lines L, and line M, therefore,
∠ABC and ∠CBE are supplementary angles
The ∠ABC < ∠CBE, and therefore, or therefore, ∠ABC is less than 90°, therefore;
Line A_F extends infinitely in both directions, therefore
Line A_F is a transversal to lines L, and line M given that it crosses the two lines at two different points
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