Answer:
d and a
Explanation:
the central nervous system is the central obviously and the peripheral nervous system takes the information the CNS wants to send and send thm to the correct organ.
Answer:
The big thing is that, in countries with high life expectancy, their old people are more likely to feel engaged. This can be a cultural difference, or it can be geographical; old people are more likely to do things if they can physically get around.
hope it helps
Answer:
contamination
Explanation:
It just keeps on going with the genetics' you want to stop happening. Different defects in the gens.