"With" or "together" "along with"
The answer would be A. An attention grabbing sentence.
From his early childhood, Nathan was bursting with creativity and
uncontainable energy, struggling not only with learning issues but also
with anxiety and OCD. He saw the world through his own unique lens—one
that often caused him to be labeled as “bad,” “troubled,” or someone in
need of “fixing.”
It is a adverb clause.
Hope this helps!