A desert is a place where there is very little water and not many plants or trees can grow. It's like a big dry area where the ground is really hot and kind of like sand. There are different types of deserts, but they all have one thing in common: lack of water.
Xeric shrublands are similar to deserts, but they have a bit more water and more plants, especially shrubs. These shrubs or small trees are really good at holding water and surviving in dry conditions. They can have smaller leaves or sometimes no leaves at all, which helps them not lose water too quickly.
Imagine a really hot day where you are outside playing and you get really thirsty. You go inside and drink a whole glass of water. But what if you were outside and there was no water to drink? That's what it's like for plants and animals living in a desert or a xeric shrubland. They have to find ways to conserve water and survive without much of it.
Some animals in these areas are really good at storing water, like camels or certain types of reptiles. Other animals, like mice or rabbits, have to find places to hide from the sun and not use up too much energy.
Overall, deserts and xeric shrublands are tough places to live because of their lack of water, but there are certain plants and animals that have adapted well to this harsh environment.