Step 1: Idea:
Start from the chart, not from the options. The five-number summary has Q1, median and Q3. Ask which chart has a box and whiskers that are drawn from exactly these numbers.
Step 2: List what the chart must show.
It must show Q1, the median and Q3. That is the information stored in a box.
Step 3: Look at what each chart is built from.
Line plot: ordered points. Pie chart: slices of a total. Scatter plot: dots for two variables. Box plot: Q1, median, Q3 and the range.
Step 4: Pick the chart.
Only the box plot is built from quartiles, so it is the answer.
Step 5: Test every option against the result.
Option 1: A line plot tracks change, and it has no box for Q1 and Q3.
Option 2: The box plot is drawn from Q1, the median and Q3, so it fits.
Option 3: A pie chart splits a total into shares, so there are no quartiles.
Option 4: A scatter plot relates two variables with dots, so there are no quartiles.
Step 6: Conclusion.
The box plot is correct, option 2.
\[ \boxed{2} \]