Question

*When water becomes unclean and poisonous due to mixing of natural or artificial unwanted material, the amount of ___________ decreases.*

1️⃣ Nitrogen
2️⃣ Oxygen
3️⃣ Hydrogen
4️⃣ Carbon dioxide

Answer 1

Explanation:

When water becomes unclean and poisonous due to mixing of natural or artificial unwanted material, the amount of ___________ decreases.*

1️⃣ Nitrogen

2️⃣ Oxygen

3️⃣ Hydrogen

4️⃣ Carbon dioxide