Answer:
correct fill up option are a. are parallel to each other
Step-by-step explanation:
here lines of latitude are parallel to each other
because as we know earth is sphere that mean it is bulging at the equator and getting reduced towards the poles
so latitudes are parallel lines of circle that is distributed toward north and south of equator
so all the latitudes is parallel to each other that's why they can never converge
and we measure longitude with respect to prime meridian
and we measure latitude with respect to the equator
so here correct fill up option are a. are parallel to each other