Ineed this one now i messed up on the other lol

The first one is X, then the second one would be X+1 ( adding one, makes it consecutive).

Now you have X + X+1 = 667

Simplify:

2x +1 = 667

Subtract 1 from each side:

2x = 666

Divide both sides by 2:

x = 666 /2

x = 333

The first marker is 333

The second marker = 333 +1 = 334

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.