The first word in the sentence is a pronoun- not an adjective.
The second option - Australian is in fact an adjective, it gives some information about the terrier.
the second option - children - is a noun, so it is not an adjective.
And the last option is a verb,
So the correct answer is B - this is the only adjective.
Answer: summon with a Gesture
Explanation:
All you really need to do is to define the word. So I would suggest looking the word up or finding it in a dictionary