Scarcity means there is not enough of something, like food or water.
Scarcity can make people feel worried or unhappy because there isn't enough of something they need.
Examples:
There is a scarcity of water in the desert.
The scarcity of food made everyone hungry.
The scarcity of toys made the children sad.
The scarcity of candy made the party less fun.
In the land of giants, there was a scarcity of tiny things.
The scarcity of stars in the city made the sky less pretty.