solved I’m studying for my Nursing class and don’t understand how

I’m studying for my Nursing class and don’t understand how to answer this. Can you help me study?

1.What is infant sleep training? Is it safe? How do new parents know if their baby needs them, or should they let the baby cry it out? Are there attachment issues new parents should be concerned about when a baby cries for too long?
2. Should parents wake a baby who has been sleeping for more than four hours to feed them?
3. What books, toys, or videos should parents give a baby to give them an intellectual advantage? Are there ways parents can facilitate a higher level of intelligence in a child?
4. Siblings are often very different in temperament. What does that mean? Why does that happen?