You see an illustration of parallel horizontal lines drawn around the earth. In the geographic coordinate system of the earth which measurements are these lines used for?

The correct option is;

a. Latitude measurement, degrees north and south

Explanation:

The lines of latitude give the measured coordinate of a location towards the north or south in relation to the equator by using a division of surface of the Earth, using 180 imaginary horizontal lines that circles the Earth from the equator to the poles, such that the equator, which is the starting point of the measurement is measured as 0, while at the poles, (north and south) the measurement are 90° each from the equator.

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun