Answer: Genetic Drift
Explanation: Genetic drift is an evolutionary mechanism whereby gene or allele frequency of a particular population change over generations due to random chance. The effect of genetic drift is most visible in small population due to reduction in population size resulting from natural disaster or splitting of a small group from the main population to formation a colony. However, it can occur in large population as well but it's effect is as strong as that occurring within a small population.
The genetic drift among the Dunkers could be attributed to the official split between conservatives and progressives members in 1882.
They can cause mud flow: in fact, in a famous volcano eruption in Chile in 1985 this is what caused the majority of the deaths .
Volcanic eruptions can also cause earthquakes, but very mild ones; the ones we hear about are usually caused by tectonic movement, not volcanic eruptions.
Answer:Weak mayor system
Explanation:Definition of weak mayor. Is a system in which the mayor doesn't hold any formal authority without the council.
The mayor doesn't have any power to either appoint or eliminate any officials in their positions and no power over council votes.
The weak-mayor system exist mostly in small towns of the United States with much smaller municipalities.
The answer to this question is Seriation.
