The answer is object permanence.
Object permanence refers to the ability to understand that an object is still present and physically exists even if it is hidden out of sight. In this example, your niece lacks object permanence since she does not understand that you are behind the blanket even though you cover yourself with it or you are temporarily.
Answer:
A. relatively more inelastic because water is a necessity
Explanation:
Inelastic goods refers to the type of goods which demand wouldn't move that much regardless of the price change.
This tends to be the case for every products that are considered as necessity.
If let's say the price of water is $1 per bottle. We all know that every human being need to drink at least 1.5 L of it to stay alive. If all producers of water decided to raise the price into $2 ,the customers would most likely still purchase it. They have no choice.
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