Explanation:

- Option 1, Income:

- Consumption is often directly linked to income. As income rises, people tend to consume more.

- Option 2, Saving:

- While saving affects how much disposable income remains, consumption is not directly dependent on savings.

- Option 3, Aggregate Demand:

- Aggregate demand influences overall economic consumption, but it's distinct from the individual consumption decision.

- Option 4, Both (1) and (2):

- This option suggests a relationship between consumption, income, and saving. However, direct dependency on both simultaneously doesn't capture the primary role of income.

Correct Answer: Option 1, Income

Both income and saving influence financial decisions, but consumption primarily depends on income.