Fill in the blank with an appropriate option.
It is important to ensure that we all have good clean water to drink that is not ______ by heavy metals or chemicals.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. contaminated.
The sentence talks about water that should be safe and pure to drink, without harmful substances like heavy metals or chemicals.
The word "contaminated" means polluted or made impure by harmful substances, which fits perfectly here.
Incorrect options:
"knotted" means tied up, which is irrelevant.
"clarified" means made clear or pure, which is opposite in meaning.
"purged" means cleansed, which doesn't fit the blank meaning.
Hence, the chosen option is correct.