A drop of water placed on a smooth, dry surface will form a dome-shaped droplet instead of flowing outward in different directions. Which of these best explains this observation? a. The bonds between hydrogen and oxygen atoms are very strong.
b. The electrons in the atoms attract the electrons in the other atoms.
c. The molecules at the surface strongly cohere to the other molecules on the surface with them.
d. Water molecules near the surface produce more buoyant force than water molecules within the liquid.

I believe it is C, I hope that's correct

Explanation:

In some conditions, a water droplet remains in the droplet form on the dry surface rather than spreading on the whole surface. It covers only remains on the mall part of the surface and making a dome shape.

It is due to the fact that the hydrogen bond between the water molecules is much strong than the attraction between the water molecules and surface.

Hence the option C is correct.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.