Like a body system? What type of system?
Vitamin A is important for normal vision, the immune system, and reproduction. It also helps the heart, lungs, kidneys, and other organs work properly.
Ill keep it short, if you dont want to do it, and or if it harms or degrades others. no
That is going to be C) adolescence because when one is an infant they don't know much and they are just learning, as a kid in our childhood. Kids just don't pay attention and want to do whatever. We would already know life skills as an adult so it is adolescence
B. Ensures that a firearm will not fire accidentally