Planes Q and R are parallel. Lines a and b are shown on planes Q and R, respectively. Which statement is true about lines a and b? They are parallel lines. They are perpendicular lines. They are skew lines. They will intersect.

The answer is option one that they are parallel lines.

When two planes are parallel to each other and the lines are shown on those two planes, the lines are also parallel to each other. for example suppose floor and roof are two planes both are parallel to each other and you and your friend stands on the floor are line a and b respectively, you will see both of you are parallel to each other.