The speed of sound speed is what it takes for a little more time and time for a new world and then when you can get it out you will even get a new one with it and you will get a little bit more money for you and will get a little longer then it is worth a try but i

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.