Alderfer's "Existence" needs concern our basic material requirements for

llving. These include what Maslow categorized as

both physiological needs and safety$-$related needs.

only physlological neesililiter, $($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$)$