Explanation:

1, 2 and 3

The Lorenz curve is the graphical representation of wealth distribution.

This statement is correct. The Lorenz Curve is a graphical representation that illustrates the distribution of income or wealth within a population.

It is most often used to represent economic inequality.

This statement is correct. The Lorenz Curve is commonly used to depict economic inequality. It shows how the cumulative share of income or wealth is distributed among the population.

It was developed by American economist Max Lorenz in 1905.

This statement is correct. The Lorenz Curve was indeed developed by the American economist Max Lorenz in 1905.

Therefore, the correct option is 4 (1, 2, and 3).