Okay kiddo, so let me tell you about Archezoa. They are a group of very special microscopic organisms that were discovered many years ago. They are different from other microscopic organisms because they do not have certain parts that other organisms do have, like mitochondria.
Now, mitochondria are special parts of our living cells that help us produce energy from the food we eat. But Archezoa do not have mitochondria, which means they have to get their energy in a different way. It's kind of like how you might have to get creative and find a different way to play if you don't have a toy you really like.
Scientists have studied Archezoa a lot to try and understand how they survive without mitochondria. They think that these organisms might have some other way of producing energy that they haven't figured out yet. It's kind of like a mystery that scientists are working very hard to solve!
So, in summary, Archezoa are special microscopic organisms that don't have mitochondria, a part of living cells that helps us produce energy. Scientists are still trying to figure out how they survive without mitochondria.