Continental-volcanic is NOT a convergent boundary. The answer to your question is B. I hope this is the answer that you are looking for and it comes to your help.
Missense mutations.
Hope this helps!
Trophic levels go by,
Producer (The nuts)
Primary Consumer (Squirrels)
Secondary Consumer (Raccoons)
Tertiary Consumer (Bear)
So squirrels would be at a lower trophic level.
Hope his help :)