For answering this question first and we need to understand the
meaning of elastic demand
An elastic demand is that type of demand in which even there is
a small change in the price can cause heavy change in the quantity
demanded
In this the consumers are price sensitive
it means even there is a small increase in the price ,the
quantity demanded falls drastically
if we talk about simple breakfast cereal then it will include
any type of bread ,maize,oats etc
so it will have more elastic demand because in this the
consumers have more choices of substitutes so if they find that the
price of breakfast cereal price rises then they will move to
another options
but in case of frosted flakes the consumers are not very much
price sensitive and it is less elastic as compare to normal
breakfast cereal