The purpose of daytime running lights (drls) is to

a. illuminate the road ahead during the day
b. illuminate the road ahead at night
c. highlight reflective surfaces during the day
d. make your car easy to spot in the daytime

The purpose of daytime running lights is to (D) make your car easy to spot in the daytime

Explanation:

Lights help to have the clear vision. Daytime running lights help during winters when fog covers up. Also it helps to have a look so that we can concentrate well. It's not just for path but also that we don't harm any animal or human.

There is nothing bad of daytime running lights. It even helps to decrease traffic and accident issues and keeps us focused. One can travel better on highways and more safely. During monsoons when dark clouds cover up during mornings and it becomes difficult to drive then this daytime running lights works as Savior.

the warning light flashes for a second or two when the engine starts. if it stays on, there's must be something wrong with the coolant. you should never dare to continue driving when the light is on. pull over as soon as possible and shut the engine off.

hope this is what you're talking about