Answer:
Niece is the right answer
Explanation:
Given that Anna has two aunts, Gertie and Samantha, and one uncle, Jimbo. Jimbo has a nephew on Anna's Side of the family, Timothy, Who has two children, john and Aubrey
This explains Anna's uncle is Jimbo and Jimbo's nephew is Tomothy.
i.e. Anna and Jimbo are maternal cousins.
Hence Timothy daughter would be a niece to Anna
Niece is the right answer