Respond 2 part:

a. A change in demand is when there is a shift in what people have the ability or want to buy. A change in quantity demanded is when there is a shift in the amount of product or service being demanded from consumers at a certain price. A change in supply is when there is a shift in the schedule of goods or services being offered at all possible prices. A change in quantity supplied is when there is a shift in the entire quantity of goods or services that are being sold.

Determinants that cause a change in demand are consumers' incomes, tastes and preferences, the prices of related goods, expectations regarding future prices and future incomes, and market size. The determinants that cause a change in supply are technology and productivity, the prices of resources used to produce the product, producers' price expectations, taxes and subsidies, and the number of firms in the industry . Many people these days have had a shift in taste and preference when it comes to milk. People have opted for dairy free options such as almond milk, cashew milk, etc. There is still plenty of demand for normal milk but there is an increase in demand for almond milk, so you see just as many alternative milk options as cow milk options.

b. A change in demand is a shift of the demand curve. This means a shift in demand for every given price. A change in demand results from changes in ceteris paribus conditions (Miller, 54). A change in the quantity demanded is a shift of a point along the demand curve resulting only from a change in price. Likewise, a shift in supply is a change of the entire supply curve as a result of ceteris paribus conditions and a change in the quantity supplied is a shift along the supply curve as a result of price changes. Ceteris paribus conditions, or determinants, of demand include preferences, changes and expected changes to prices and incomes, and market size . Determinants of supply include productivity, input resources cost, price expectations, taxes, and the number of competitors. Currently, a change in input costs for food has created major shifts in its supply. Products such as fertilizer have seen significant jumps in cost which increases the cost of growing food. This additional cost lowers supply of food which has resulted in higher food prices for consumers.