Antarctica is a continent which is covered with ice and snow most of the year, and it is the home of many different kinds of animals and plants that cannot be found anywhere else on earth. These animals are called "Antarctic fauna" and the plants are called "Antarctic flora". Unfortunately, because humans have been visiting Antarctica more and more over the years, there has been a risk that some of these species may become extinct, which means they will no longer be alive.
To prevent this from happening, people from all around the world have come together and agreed to create some special rules and measures that will protect these animals and plants. These rules are called "agreed measures for the conservation of Antarctic fauna and flora".
These measures include things like making sure that people who visit Antarctica do not bring any harmful plants or animals with them, and that they do not disturb the animals and plants that are already there. There are also rules about what kinds of activities are allowed in different parts of Antarctica, and what kind of equipment people are allowed to use.
All of these rules are designed to make sure that people can still visit Antarctica and enjoy its beauty, while also making sure that the animals and plants that live there are protected and can continue to thrive. So, if you ever get to visit Antarctica, be sure to follow the rules, and remember to leave it just as you found it, so that others can enjoy it too!