Answer:
1.1 billion don't have access to clean water and a third of the world's population doesn't have access to drinking water.
Explanation:
The slow breakdown of rock into soil is called weathering
The appropriate choice for the non-event is ...
... A. The costs of sewing machines began to increase.
_____
Interchangeable parts generally reduce costs and increase demand (and production).
A trapezoid is a type of quadrilateral that has an opposite pair of parallel sides; at lest, that definition seems pretty accurate to me.