Please no links or files or I will report What causes the different phases of the moon's light and dark appearance?
B. the distance between the moon and the Earth
C. the moon's position in relation to the Earth and sun
D. the speed the moon is travelling next to the Earth
P. S the question is supposed to look like this.
P. P. S please no file hosting

C

Explanation:

The moon revovles around the sun. While the moon goes around the earth, some half of the moon will be lighted up by the sun. The other side will always be in darkness. Hope this helps :)

C. the moon's position in relation to the Earth and sun

Explanation:

btw is there an option A?

hope this helps and is right :)

i think the answer would d

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.