Biotic Factor
Living organisms and their interactions that influence other organisms in an environment.
Real World
The reintroduction of wolves to Yellowstone National Park in 1995 changed elk grazing behaviour, allowing riverside vegetation to recover — a biotic factor reshaping the entire ecosystem.
Exam Focus
Name the specific interaction type (predation, competition, mutualism) rather than just saying 'biotic factor' to access full marks.
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