So, imagine you and your friend really like each other and want to be friends forever. That's kind of what the Polish-Romanian alliance is like. Poland and Romania decided that they wanted to be friends and help each other out if they need it.
But why did they decide to be friends? Well, Poland and Romania are both countries in Europe, and they have some common interests. They both want to be safe and secure, and they both want to be strong and respected.
By being friends, Poland and Romania can work together to make sure they are safe and strong. They can share ideas and resources, and help each other out if there is a problem. For example, if Poland had a war with another country, Romania might send soldiers to help protect Poland. Or if Romania had an earthquake and needed help, Poland might send supplies and workers to help them.
Overall, the Polish-Romanian alliance is just like having a really good friend that you can always count on. They are there for each other and have each other's backs.