Explanation:

- Option 1: Indifference curve

- It shows combinations of goods providing equal utility.

- It does not indicate how much utility increases with additional consumption.

- Option 2: Total utility curve

- Represents overall satisfaction from consuming units of a good.

- It is derived from the sum of marginal utilities.

- Option 3: Supply curve

- Shows relationship between price and quantity supplied.

- Not related to a consumer's utility.

- Option 4: Demand curve

- Shows quantity a consumer is willing to buy at different prices.

- Marginal utility curve shows how a consumer's willingness to pay changes with quantity, which relates to demand.