Answer:
the source is the starting point of a river.
Sam is in Piaget's preoperational stage of cognitive development. In addition, the preoperational stage is the second stage in Piaget's theory of cognitive development in which this stage starts around age 2 as children start to talk and last until approximately age 7. Throughout this stage, the children begin to take part in a symbolic play and learn to use symbols.
Answer:
Guide question:
1.healty lifestyle
2.that can cause bad effects in our body
3.eating healthy foods.
sorry kung may wrong grammar.
Answer:The population was becoming too old
Explanation: