The most important factor affecting the baby's health is the mother's nutrition.
water is the most important factor affecting life because they LACK WATER
The most important fator is heat!
Relative salinity is the most important factor in seawater density.
The most important factor affecting how chemical bonds form is the number of electrons in the valence (outermost) shell of each atom involved.
It's easily the most important thing for human beings. If you don't have good health, then nothing else matters. I would put health and wellness at the top of the list of essentials for any person.
the sun and air pressure
The most important rule for health and safety at work is "Be aware and alert."
competence and character