So, imagine you have a toy box with lots of different toys inside. Now, you have a really big task to do - to clean up your room. But it's a lot of work for just one person to do it all alone. So, you decide to ask your older brother for help.
Your brother agrees to help, but he says he needs some help too. So, he starts assigning different jobs to each of the toys. Barbie doll is in charge of organizing the clothes, Hot Wheels cars need to be put away in the car box, and the stuffed animals can be arranged on the shelf.
In this example, your brother is like the "agency" and the toys are like different administrative divisions. The agency divides up the work and assigns specific tasks to each division to make sure that everything gets done efficiently and on time. This is what an administrative division does - it helps organize and manage different parts of a larger task or system.
In the same way, in a government or organization, there are different departments or divisions that each have their own specific responsibilities. For example, in the US government, there is the Department of Defense, the Department of Education, and the Environmental Protection Agency (EPA) - each has its own area of responsibility and authority.
We need these administrative divisions to make sure that things run smoothly and that everyone is doing their part. Just like your toys needed your brother's help to clean up the room, sometimes people and organizations need help to accomplish big tasks, and that's where agencies come in to help.