What box is it please answer if u know :)

Firstly, let's understand the meaning of ammonities.

Now, the answer is:

The scientists were not certain what living ammonites looked like because the insects or creatures living in those shells could be of different looks and as no living ammonite has ever been found(only we have discovered their shells through fossils) thus, no prediction could be done about it.

the answer is . a novel has no sub-plot, but a novella does