Many children live a hard life. There are many reason for it.
First, some children become poor because of parents. For example, their parents are poor so, they also become poor. Some children live with single parents or grandparents. These situations also can be causes. Some children are orphaned, so they don't have a person who supports them. That's why they can't receive an education. Another case is when their parents have an addiction to something, so they do not support their children. In addition, some people suffer from domestic violence. This is one of the most serious problems.
Second, the nation they live in can also be a problem. For example, forty percent of the children in Greece live in isolated populations. Also, the war is not yet over in some countries. Thus fifty million children lose their house. 28 million people are forced out of their homes. Ten million refugee children immigrate abroad. 1/3 of refugees are children, and the number of refugee children are increasing. In 2015, more than one hundred thousand children ask for asylum without a guardian. If we compare to 2014, this is more than three times the figure. The other problem is after they immigrate abroad. Because if they go to another country, they are short of money. They cannot receive an education despite even though an education is the purpose in immigrating. The refugee children are five times more likely to not go to school. Even though that can go to school are bullied at school. They are also not treated well outside of school because of regulations and the legal system. Many refugee children can't receive an education. So it becomes a big problem for them.