Which statements are accurate? check all that apply.
layer c is younger than layer a.
layer b is younger than layer a but older than layer d.
layer d has an older relative age than layer c.
if a geologic event tilted these layers, layer b would no longer be the oldest.
it is possible to determine the absolute age of layer c with the information given.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

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.

yes

explanation

they do and it slaps