I answered a question correctly and someone deleted my answer without giving me any explanation. I don't know why someone would do that but its really rude. Like someone is trying to help others and you are deleting their answers. What is this??

This has happened to me more than you can count. Usually it's because ofs policy. If the question or answer is not academically related, or you copied from another source, they'll most likely take it down. But I understand where you're coming from. Sometimes they take it down for no reason! I don't know why they do this, but I am not a big fan of it >:((

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.

image for option 4

step-by-step explanation:

i just know the internet