The correct answer is c.stops after infancy and childhood.
Myelin is the substance of the central nervous system (CNS) that insulates nerve cell axons to increase the speed at which nerve impulse travels. Myelination is a process of myelin formation. This process occurs postnatally, begins in the embryo during the midst of early development and finishes after birth.
The hyngrim method from the old sience method
Answer:
In the given case, the upsurge in the size of the squirrel population would have taken place due to genetic variation and more availability of food. Genetic variation plays the most important role in the process of natural selection and is the basic mechanism of evolutionary change. Genetic variation refers to the variation in DNA between the individuals.
Thus, it can be said that in the given case, the amount of food, which was less in the past may have got increased, and the squirrels of the coming generations would have demonstrated higher levels of genetic variation than shown by the previous generations. Thus, the number of squirrels got increased in the population.