The answer is neuroplasticity. The cerebrum's capacity to rearrange itself by shaping new neural associations all through life. Neuroplasticity enables the neurons in the mind to make up for damage and ailment and to modify their exercises because of new circumstances or to changes in their condition.
Biochemical stress is another factor fire
Evolution is how we came to be as human beings ranging from rats, apes etc. This has helped us increase our survival skills and communication (ever since the beginning)
After conception, the next 2 weeks is the germinal stage
