The three pre-reading strategies that an active reader should follow are preview, plan, and predict. The correct answer is D.
1st : Somebody can fall out and drown
2nd : The dancer can fall and hurt her leg
3rd : The fish death rate may rise
4th : The shark may eat somebody
5th : The cat or whatever that is can be eating something with a deadly sickness
B. Roots
Roots are the smallest meaningful parts of words. For example the root word of aquamarine would be Aqua, which means water. So the root word can also give you a hint on the meaning of the word.
Hope this helps :)