Landslides, mudflows, slump, and creep are all examples of

a.
mechanical weathering.
b.
runoff.
c.
mass movement.
d.
soil formation.

c.  mass movement.

Explanation:

Landslides, mudflows, slump, and creep are all examples of  mass movement or mass wasting. As all these process involves the downward flow or movement of materials such as soil, sand, rocks and other particles which goes down the slope due to the effect of gravity. Such materials due to unstable orientation flow downwards.

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

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

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