Answer:
The speed of the light waves will decrease
The people who lived in the rural areas faced the difficulties to get the portable water because they uses the water from the unprotected ponds and tanks, wells, cisterns, streams and rivers .
<u>Explanation:</u>
They used the unprotected water for drinking, bathing, washes clothes and livestock washing. The lack of infrastructure and facilities to monitor and maintain the adequate water quality .
It is essential to examine the quality of the drinking water used by the rural communities. The drought prone areas that lack a proper waste supply infrastructure.
Mass/volume
<span>for an irregular solid, the easiest way to determine volume is to fill a graduated cylinder to a certain level, record the level of water, then carefully place your solid in the cylinder and record the height of the water after the solid is in.
</span><span>the volume of a regular solid by measuring the lengths of its sides and determining the volume by multiplying length x height x width </span>
Probably these two choices as well: <span>slow movement of the continents.
sea floor spreading from ocean ridges</span>