A/RES/63/241 undermine the achievement of the Millennium Development Goals and stresses that solutions need a comprehensive and multifaceted approach requiring short-, medium- and long-term and sustained actions; 26. Calls upon all States to take immediate steps to eliminate child hunger, including through the adoption or strengthening of national programmes to address food security and adequate livelihoods, as well as nutritional security, especially regarding vitamin A, iron and iodine deficiencies, the promotion of breastfeeding, as well as programmes, for example, school meal programmes, that should ensure adequate nutrition for all children; Elimination of violence against children 27. Condemns all forms of violence against children, and urges all States: (a) To take effective and appropriate legislative and other measures or, where it exists, to strengthen legislation to prohibit and eliminate all forms of violence against children in all settings; (b) To respect fully the rights, human dignity and physical integrity of children and to prohibit and eliminate any emotional or physical violence or any other humiliating or degrading treatment; (c) To give priority attention to the prevention of all forms of violence against children and to addressing its underlying causes and its gender dimension through a systematic, comprehensive and multifaceted approach, recognizing that witnessing violence, including domestic violence, also causes harm to children; (d) To protect children from all forms of violence or abuse by all those who work with and for children, including in educational settings, as well as by Government officials, such as the police, law enforcement authorities and employees and officials in detention centres or welfare institutions; (e) To establish complaint mechanisms that are confidential, age-appropriate, gender-sensitive and accessible to all children and to undertake thorough and prompt investigations of all acts of violence and discrimination; (f) To take measures to ensure that all those who work with and for children protect children from bullying and implement preventive and anti-bullying policies in order to ensure a safe and supportive environment free from harassment and violence; (g) To strive to change attitudes that condone or normalize any form of violence against children, including cruel, inhuman or degrading forms of discipline, harmful traditional practices and all forms of sexual violence; (h) To take measures to promote constructive and positive forms of discipline and child development approaches in all settings, including the home, schools and other educational settings, and throughout care and justice systems; (i) To end impunity for perpetrators of crimes against children and to investigate and prosecute such acts of violence and impose appropriate penalties, recognizing that persons convicted of violent offences against children, including sexual abuse, who continue to pose a risk of harm to children should be prevented from working with children; (j) To establish and develop safe, well-publicized, confidential and accessible mechanisms to enable children, their representatives and others to report violence against children as well as to file complaints in cases of violence against 8