The used there engineering skills to control water flow to bring fresh water in
Answer:
Elaboration likelihood model
Explanation:
Elaboration likelihood model is defined as a theory of persuasion that suggested that persuasive messages has a kind of leverage on individuals' attitudes by two different routes, central or peripheral.
It further stated that, in a situation where by there is high motivation and ability to process messages, the individual involved often go the central route. However, when such individual has neither motivation or the ability to process the message, there is tendency to take the peripheral route.
Hence, According to ELABORATION LIKELIHOOD MODEL, people are more likely to carefully evaluate a persuasive message when their motivational state is high, and when they have the ability or knowledge to evaluate the information.
The answer is: Pre operational stages.
According to piaget's theory, children will started to recognize and learn to manipulate symbols during pre operational stages.
They will start to understand hand gestures, facial expression, and voice intonation that given by other people.