Answer:
Natural factors of population change can't be swayed by humans. So for an example of a natural factor take an Earthquake. As of right now we can only predict when Earthquakes will. Inevitably some things will still get damaged and that just can't be helped. An Artificial factor for population change is something specifically made by humans. For an example take a genocide. If some guy decides he wants to go on a killing spree, well all I can say is that is Definitely not natural. Hope that helped.
Answer
Except Acidophilus milk
Explanation
Acidophilus is a strain of healthy bacteria that is enriched in milk. It naturally lives in the digestive track and genital regions and serves to supplement a person’s diet with acidophilus milk that has therapeutic advantages. Salmonella is a rod-shaped Gram-negative bacterium. E.coli bacteria are harmless and keep the digestive track functioning though some strains can result to diarrhea if contaminated food or fouled water is consumed. Clostridium Botulinum is a rare and life-threatening bacteria illness.
B- distress is the answer
