Answer:
A fact.
Reasoning:
If it was an opinion, it would say "I think" in the beginning.
Do note that not all sentences have to start with "I think" though.
The answer in the space provided is spontaneous recovery. It
is referred to be a phenomenon of which an individual has recovered from a
conditioned response when it has been triggered or exposed to the individual
where in his or her fears are expelled once he or she has been recovered.
