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Phantasy [73]
3 years ago
10

In very early human history, complex sanitation systems were not needed because settlements were usually very small, like the vi

llage shown below.
However, as cities became larger and population densities increased, one major advancement was the development of _______, which helped to channel wastewaters away from human populations more effectively than in the past.
A.
fountains
B.
water towers
C.
sewer systems
D.
dams

Engineering
2 answers:
victus00 [196]3 years ago
8 0

Answer: sewer systems

Explanation:

faltersainse [42]3 years ago
4 0
Answer:
C. Sewer Systems
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