I think the top three statements are the answer.
The answer is an overhunting.
<span>The bottleneck event means drastic reduction of the population size because of environment changes. The consequence of this is the reduction of genetic variation. The bison population is a good example of the population bottleneck. The bison population drastically reduced its size due to overhunting which culminated at the end of the 19th century, when bisons almost extinct. </span>
Answer:
Biological predispositions
Explanation:
A Biological Predisposition is an expanded possibility of building up an infection or example of conduct dependent on the qualities we acquired from our folks (and our's folks). Qualities impact our character attributes, our IQ, our probability of getting malignant growth, and even our odds of turning into a heavy drinker.
Being predisposed to a turmoil doesn't imply that we will create it, just that we are progressively powerless against it dependent on our hereditary cosmetics. Natural hazard variables join with ecological factors, for example, stress or diet to trigger a confusion.
Research studies utilizing twins have demonstrated that numerous attributes and disarranges are heritable. For instance, in indistinguishable twin sets, on the off chance that one twin is determined to have schizophrenia, there is a half shot that the other twin will likewise be analyzed. Be that as it may, in congenial twin matches, this rate is just 15%. Since indistinguishable twins share a larger number of qualities than brotherly twins, we can infer that schizophrenia has an acquired organic premise.
