Rivers have always played an important role because they gave a windows of opportunity for a civilization to build and expand its influence and power through trading and just having a source of life near to it; namely a big river.
Answer I'll tell you later
Explanation:
.
The answer is A. The cause of the
disorder may be specified with certainty.
Post-traumatic stress disorder is
a mental health condition that is triggered by a terrifying event which can arise
from either experiencing or witnessing the event. Symptoms of this disorder may
include flashbacks, nightmares and severe anxiety, as well as uncontrollable
thoughts about the event.