flex-direction: row;

align-items: stretch (default)
ABBA Bon Jovi Creedence Clearwater Revival
align-items: flex-start
ABBA Bon Jovi Creedence Clearwater Revival
align-items: flex-end
ABBA Bon Jovi Creedence Clearwater Revival
align-items: center
ABBA Bon Jovi Creedence Clearwater Revival
align-items: baseline - I've added a <hr> here so you can see the baseline alignment more clearly.
Alice
In
Chains Bon Jovi Creedence Clearwater Revival
align-items: last baseline
Alice
In
Chains Bon Jovi Creedence Clearwater Revival

flex-direction: column;

stretch (default)
ABBA Bon Jovi Creedence Clearwater Revival
flex-start
ABBA Bon Jovi Creedence Clearwater Revival
flex-end
ABBA Bon Jovi Creedence Clearwater Revival
center
ABBA Bon Jovi Creedence Clearwater Revival