Step 1: Read the term.
We must explain what disguised unemployment means and pick the matching option.
Step 2: Meaning of the term.
Disguised unemployment is when more people are working on a task than are actually needed. They look employed, but some of them add nothing extra to the output.
Step 3: A simple example.
Suppose a farm really needs only $5$ workers, but $8$ family members work on it. The output stays the same. The extra $3$ workers are not truly adding value.
Step 4: Where it is common.
This problem is seen mostly in agriculture, where whole families work on small plots of land even when fewer hands would do.
Step 5: Test the options.
The options about industry and the service sector do not fit the classic meaning. The one about agriculture, where more people work than needed, fits exactly.
Step 6: Choose the answer.
So disguised unemployment means employing more people than necessary in the agriculture sector.
\[ \boxed{\text{Employment of more people than necessary in the agriculture sector.}} \]