Which sentence uses the word contaminants correctly? 1. Potential contaminants should let their instructors know if they are interested in applying to the university.

2. The contaminants were notified that they had advanced to the next round of competition.

3. The city ordered that the pond be closed to swimmers after it was found to be full of contaminants from a nearby factory.

4. The contaminants of the invasive pests is crucial to keeping the native plants healthy.

I think its #3

Explanation:

the answer is most likely the 3rd.

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.  

wheres the following authors?