Below is a container-fluid, which is just what I usually call a full-width stripe.
It contains a row of responsive columns that uses lg and md device column sizing.
Cat

Some cats can be allergic to cats

Meow
Bat

There are caves in Puerto Rico where you can see bats

Fang
Rat

I don't like rats because of a movie I saw

Cheese

Below is a container, which on a large screen looks like what I usually call centered fixed-width content. However, when you resize the browser window, you will see it scales down across the breakpoints to center the content different screen sizes. That's actually very cool.
It contains a row of responsive columns that uses lg, md, and sm device column sizing.


A crocodile cannot stick out its tongue :(
Pigs physically cannot look up at the sky.
A shrimp's heart is in its head.

Martial Arts is cool.

People claim to like soccer only around the World Cup.

Grogu is elite.