The correct answer is option 3: 1, 2 and 3.

Let`s analyze each option to understand why they do or do not affect an individual`s demand for a commodity:

1. Price of the commodity: The price of a commodity definitely affects the demand for it. Generally, when the price of a commodity increases, the demand for it decreases, and vice versa. People are more likely to buy a commodity when its price is lower, and less likely to buy it when the price is higher.

2. Income of the consumer: The income of a consumer also plays a crucial role in determining the demand for a commodity. When the income of a consumer increases, their purchasing power also increases, which in turn leads to an increase in demand for various goods and services, including commodities.

3. Prices of related goods: The prices of related goods can impact the demand for a particular commodity as well. Related goods can be substitutes (goods that can be used in place of each other) or complements (goods that are used together). When the price of a substitute good increases, the demand for the original commodity may increase as consumers switch to the substitute. Similarly, when the price of a complement good decreases, the demand for the original commodity may increase as