Answer:
The bottleneck effect, also known as a population bottleneck, is when a species goes through a "bottleneck" event that suddenly significantly reduces its population. ... The bottleneck effect is a type of genetic drift, which is defined as a random change in allele frequencies.
The answer is, 43 km/hr . Speed is,

So we will divide the given distance to the given time, so :
Answer:
There is gravitational attraction between them
Cations are positive so they have less electrons than protons, while anions are negative so they have more electrons.