Question

Question 3: FIT FOR DRINKING

The cleaning of water often happens in several steps, involving different techniques.

The cleaning process shown in the figure involves four steps (numbered 1–4).

In the second step, the water is collected in a settling pond.

In what way does this step make the water cleaner?





A. The bacteria in the water die.

B. Oxygen is added to the water.

C. Gravel and sand sink to the bottom.

D. Toxic substances are broken down.​

Answer 1

Answer:

Hello!

Option B is correct....

May be.......

But you didn't posted the figure.....