The new who growth standards stress that is the biological norm for infant nutrition.

Breastfeeding

Breastfeeding is an activity of feeding a baby or a young child with breast milk from a woman. Breastfeeding provides young infants with the nutrients they need for healthy growth and development. The new WHO growth standards emphasized that breast milk is the perfect food for newborn.

i do not know and i have a 100 in this class

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds