Question

unequal distribution of wealth means that land and money are controlled by
a small number of people.
government officials.
a large number of people.
private business groups.

Explanation:

Unequal distribution of wealth implies that resources (land and money) are concentrated. A small number of people having control aligns with the concept of inequality. Government officials (could be part of a small group but not the general case for unequal distribution definition), a large number (contradicts 'unequal' as it would be more equal), and private business groups (a subset of a small number but not as general as 'a small number of people' which encompasses various elites like business, inherited wealth etc.).

Answer:

a small number of people.