Undernutrition in children means they are not getting enough of the right types of food to grow and be healthy. This can happen for different reasons, such as not having enough food at home, being too sick to eat, or not having access to the right types of food, like fruits and vegetables.
When children don't get enough of the right types of food, their bodies can't grow properly, and they can become very sick. They may also be more likely to get infections, have trouble learning, and develop other health problems.
To help prevent undernutrition in children, it's important for them to eat a balanced diet that includes all the different types of food they need to grow and stay healthy, like fruits, vegetables, proteins like meat or beans, and grains like bread or pasta. It's also important for families to have access to enough food, and for children to be able to eat safely without getting sick from things like contaminated water or dirty hands.