$7$ of $12$

Alderfer's "Existence" needs concern our basic material requirements for living. These include what Maslow

categorized as

both physiological needs and safety$-$related needs.

only physiological needs $($such as air, food, water, and shelter$)$

social needs $($such as having family bonds, romantic relationships, and reliable friends$)$

safety$-$related needs$($such as health, secure employment, and property$)$