Answer:
I think C
Explanation:
New neurons are born not from mature nerve cells but rather develop from neural stem cells that remain in our brains throughout life. Indeed, in some brain areas, there is continual turnover of neurons - old ones die and new ones are born - and these new neurons can participate in circuits that underlie learning.
Radioisotopes tell scientists that the earth is 4.5 billion years old.
Answer:
The over loaded of peoples is called overpopulation. There will be more crowded and people will be unemployed and It can effect the global warming
