Answer: Bottleneck effect
Explanation:
The bottleneck effect is terms of population size is one of the concept in which there is large reduction in the population size due to the various types of environment related factors and also due to the human activities are as follows:
- Floods
- Droughts
- Fires
- Earthquakes
- Planning of the human population
According to the given question, Bottleneck effect is one of the congestion point in which the large number of species or we can say that population is killed and it also increase the genetic drift. So, the above given situation is illustrating the concept of bottleneck effect.
Therefore, Bottleneck effect is the correct answer.
Answer:
In his first inaugural address, United States President Franklin D. Roosevelt, made some attempt to assess the enormous damage: "The withered leaves of industrial enterprise lie on every side; farmers find no markets for their produce; the savings of many years in thousands of families are gone. More important, a host of unemployed citizens face the grim problem of existence, and an equally great number toil with little return." He was speaking of the Great Depression of 1929 to 1940, which began and centered in the United States but spread quickly throughout the industrial world. Despite describing the Great Depression with grim words, this economic catastrophe and its impact defied description. The United States had never felt such a severe blow to its economy. President Roosevelt's New Deal reshaped the economy and structure of the United States, however, in order to end the poverty during the crisis. The New Deal programs would employ and give financial security to millions of Americans. These programs would prove to be effective and extremely beneficial to the American society as some still provide the economic security and benefits today.
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I think the answer would be a
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