Answer;
A bottleneck effect
Explanation;
When only a few individuals survive unfavorable times, thereby losing the majority of genotypes in the next generation, it is called a bottleneck effect.
It occurs when there is a disaster of some sort that reduces a population to a small handful, which rarely represents the actual genetic makeup of the initial population.
Answer:
Answer is criminal gang.
Explanation:
A gang can be explained or described as group of individuals coming together with a oneness of achieving a purpose. This purpose is usually achieved by illegal means, that is by violent behavior.
The criminal gang can be described as a gang which is characterized by theft, extortion and other illegal means as source of their income.
In this case, the young men that grow up in this type of environment , engage in those illegal way of making money to fend for themselves and families. And they usually buy things in order to impress and oppress, to lure other people into their way of making income.
This way as source of income is bad and always end badly.