Thousands of years ago, during the Stone ____, early humans began to use simple tools made of rock and bone. These people were part of ancient ____ that slowly became more advanced as they learned new ways to survive. Scientists study the ____ of our species to understand how we changed over time. They have ____ many things at a special site in Africa, where old ____ and a complete ____ were found. The ____ of an adult human head showed that our ancestors were smaller but very intelligent. Their ____ was made of fruits, meat, and roots. Scientists ____ that we are all ____ of the same early humans who lived there. By studying them, we can ____ learning about how we became who we are today. This knowledge is very ____ for scientists and students who want to understand the history of life on Earth. In many parts of the world, some children still have to work instead of going to school. They do not receive a good ____ and often spend their days doing difficult ____ to earn money. A ____ should be learning new skills and enjoying free time, not working long hours. People from every ____ must work together to stop child labor. Many of these children live in poor ____ where families have few choices. They need food, so they work to help their ____’ families continue living. However, experts ____ that giving children the chance to study is the best way to build a more ____ and fair society. When governments and organizations create ____ programs, children can grow up healthy and strong, and later become responsible ____. Ending child labor is important so every child can have a better future.

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