Limited resources of food and water, natural disasters of the environment due to fire, floods, etc., spread of deadly diseases that wipe out entire areas, predators, etc. These factors result in small population.
law
Phenomena can happen in various environments such as nature, social interactions, and scientific experiments. They can occur both spontaneously or as a result of specific conditions or events. Ultimately, phenomena are observable occurrences that can be studied and analyzed in different fields of study.
Social, political, and economic conditions can alter the nature and meaning of art. There is censorship which may occur, as well as various themes and inspirations which are to be taken from the situations occurring in the artist's life.
An element occur in nature as a pure element or as a compound.
Bromine is a liquid but doesn't occur in nature as a free element.
If all conditions are the same, then the same results will occur. (Objective reality is deterministic.) If a scientific theory predicts a certain result but it does not occur always, then the theory is incomplete or incorrect (or both).
Small populations
Bromine is a liquid but doesn't occur in nature as a free element.
Yes, the halogens did occur in nature as free elements.
Genetic drift has a larger effect on smaller populations.
Gravity, electromagnetism, friction, and wind are forces that occur in nature. Earthquakes, volcanic eruptions, lightning, and tornadoes are natural phenomena that occur in nature.
Malabsorption syndromes occur when certain conditions result in impaired absorption of nutrients, vitamins, or minerals from the diet by the lining of the small intestine