When toddlers first learn words, they often apply them too narrowly, an error called?

1) it’s good for teens to be aware because it could guide healthy decisions and what makes them happy. it’s best to know cpr so it can save a life. since most people don’t do it when needed because they’re afraid of hurting the person (idk the rest but i could only with that )

The answer is keep records

Immunization is the introduction of a foreign substance to provoke  the immune response system.  immunizations are the same as vaccinations. it introduces foreign (but dead/ weakened) illnesses to train the body to fight against them. specific viruses and bacteria have specific antigens, antigens act sort of like name tags. these name tags the immune system recognize what's dangerous to the body and what's safe.