(A) Parallel lines are never intersected
They are move with the same distance between each other
In the figure lines p and l are intersected, so
l and p are not parallel
If you extend lines l and m will intersect
l and m are not parallel
Lines l and k move together with the same distance between them
Then they are never intersect
So lines l and k are parallel
l // k
They are parallel because they never intersect
b)
To obtain line k from line l
Translate line l to up to get line k
c)
To obtain line p from line l
Rotate line l 90 degrees anticlockwise (or clockwise) to get line p