The imaginary lines highlighted on the map travel from north to south and are used to measure distance from the prime meridian. they are

 lines of longitude

Explanation: lines of longitude are the imaginary lines that travel from the north and south of the Prime Meridian that help find exact location

the answer is "d"

(context) if you were to travel to the middle east and go into peoples homes there would be like 4 generations in there

(more context) i'm pretty sure in the middle east they take loyalty and family bonds very serious

(last bit of context) i'm also positive that extended families are most commonly found in urban areas