Which of these are mental skills which of these mental skills that develop during infancy? Check all that apply.
the ability to breathe
the ability to talk
the understanding of object permanence
the ability to hear
the ability to display a range of emotions

the answer is a a teenager needs more sleep than the adult no matter what

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.