Because there always needs to be something that starts it off. Eg: If there was no grass, there would be no animals.
The federal government regulates and controls the economy through numerous laws affecting economic activity.
I hope that answers your question.
<span>Conservationists establish that the minimal viable population of a population of tigers in an extensive geographical area is 16. Given that the current population of tigers is 10, which is lower than the established minimal viable population, the tigers </span><span>will die out because they will be unable to sustain their population. </span>