Agricultural extension is like having a teacher for farming. Just like how you have a teacher at school to help you learn new things, farmers have agricultural extension agents to help them learn new ways to grow fruits and veggies or raise animals.
These agents are really helpful because they know a lot about farming and can answer questions that farmers might have about how to grow their crops or take care of their animals. They might teach farmers about new technologies or methods that can help make their farm better.
So, agricultural extension is basically like having a really smart teacher to help farmers learn how to do their job better and more efficiently.