What can happen when untreated sewage contaminates water?
erosion can increase.
o bacteria and viruses can spread.
heat pollution decreases.
o silt and suspended particles settle to the bottom.

Bacteria And Viruses can spread.

Step-by-step explanation:

Sewage is treated for bacteria, chemicals, and much more.

If this is not treated the sewage overflows with harmful bacteria. This gets into the water that we drink and can cause lots of things harm.

Hope I could help!! Have a great day!

step-by-step explanation:

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.