Section 2

 goods that are purchased to support/go with another product (petrol & cars).

 movement along the demand curve to the left (higher price & lower quantity demanded).

 movement along the supply curve to the left (lower price & lower quantity supplied).

 want/willingness to buy a product.

 the financial ability to actually purchase the product.

 the responsiveness of quantity supplied or demanded in relation to changes in price/income/other products.

 the point at which the supply and demand curves cross/intersect

 quantity demanded is greater than the quantity supplied at a given price.

quantity supplied is greater than quantity demanded at a given price.

 a movement along the demand curve to the right (lower price & higher quantity demanded).