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Across 3. When two people focus on the same object or event 4. stage where an infant begins making speech-like sounds 6. Sudden unexplained death of an infant 7. Rapid and temporary growth of brain connections during infancy 8. Process of becoming protected from a disease 9. most of the people in a group are protected from a disease 11. failure of a child to grow to a normal height because of malnutrition

Down 1. Brain structure that helps form long-term memories 2. learning through the senses and physical actions 5. Repeated action that helps an infant learn 6. Connection where neurons communicate 10. Severe underweight caused by malnutrition