Why are children used in War and how does this take away their Human Rights and Freedom?

Child soldiers are children who are forced to fight in wars because some of the children have lost their homes and families because of war or terrorist attacks, these children are all under the age of 18 and have lost many of there human rights.
Child victims who have been forced or lured into armed groups suffer a broad range of human rights violations and abuses, including their right to life, right to not be subjected to sexual violence or other forms of torture, the right to an education and the right to freedom of thought and religion. For example in Somalia, there are 920 children serving, these children are being abducted from there homes and schools along with their entire classes and are taken to fight in the war but some children serve as combatants, others also serve as porter, messengers, spies and cooks, and some young girls are forced to marry al-Shabab militants or recruited as sexual slaves in brothels. Child soldiers do not have human rights because they are forced into a lifetime of war and slavery.

The reason I have written this is because we are 
learning about child soldiers in the class and are 
learning how to write a seel paragraph.