Well, this answer can be many things! I would say "When you read carefully in order to determine the meaning of a challenging word, you are 'using context clues'", perhaps? Maybe not...how about "...using prior knowledge"? Since you didn't offer any alternative answers, or list any answers, I can only guess. I hope I helped you a little bit!
Here are the vocabulary words matched with their definitions:
1. Gamboled : LEAPT (A)
2. Glimmeringly : UNSTEADILY (D)
3. Hindrances : HANDICAPS (E)
4. Snaggletooth : IRREGULAR (B)
5. Vigilance : CAUTION (C)
These are the synonyms or the words that matched the definition of the given ones. Hope this helps.
There will be two small boys on one side and one big boy on the other side
I believe that the answer is c. but it could be d.