The basic causes that make life vulnerable to extinction are:The lack of genetic diversity The creatures have a genetic element. Only a single result, the creature has no alternative when the environment changes. Factors that will result in reduced genetic diversity, breeding between organisms of the same species. Breeding between the organisms that have the same characteristics. No migration The population is small and the environment suddenly warping, etc.The decline of population in each local housing. Each unit of organisms arise and die away, but the population of the creatures still exist because each creature inherited the same type progeny itself. Thus, sustainability of population of each type of creature, it depends on the ability to sustain or increase the number of offspring in the future versions of the importance thus depends on whether that population is capable of reproductive much. , Which is linked to the number of the population in reproductive age. The ratio of male reproductive rate. Survival rate of the population of reproductive age and opportunity before the match so when breeding reproductive population has encountered a problem and thus reduced the risk of extinction of a population. In addition, a small population also cause random genetic risk environment and breeding occurred among relatives by implication. Which causes genetic diversity decreased as a risk rate increase.Loss of Habitat and housing. Organisms cannot survive if its descendants inherited the resident housing. Many organisms need a local natural habitat, it will inherit the descendants have the word "home" is a specific number of areas only. But the environment as well as both physical and biological elements.
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