Ask the questions in here not in the photo I might be able to help
<span>Supply is a basic economic concept that
describes the total amount of a good or service that is available for
consumption. The law of supply is a central tenet of economic theory which
postulates that keeping other factors constant, an increase in price results in
an increase in quantity supplied.</span>
The action is the snowball hitting the girl's back, the reaction is the snowball bursting from impact force all over her back.
It seem like there are information missing on the question posted. Let me answer this question with all I know. So here is what I believe the answer is, family income.
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.