Let's analyze and verify each part of the solution:

1. Concavity of the Parabola: You correctly identified it as "concave down." This is because the parabola opens downward in the graph.

2. Maximum or Minimum: Since the parabola is concave down, it has a maximum point. Your answer is correct.

3. Axis of Symmetry: The axis of symmetry is the vertical line passing through the vertex. Here, it should be at $x = -2$, which you correctly marked.

4. Coordinates of the Vertex: Observing the graph, the vertex appears to be at $(-2, 4)$, which you have also entered correctly.

5. Horizontal Intercepts: The horizontal intercepts are the points where the parabola crosses the x-axis. From the graph, these points seem to be:

   • Left intercept at $(-4, 0)$
   • Right intercept at $(0, 0)$

   You entered these correctly as well.

6. Vertical Intercept: The vertical intercept is where the graph crosses the y-axis. This occurs at $(0, 0)$, which matches your input.

Upon reviewing each section, it appears your entries are all correct based on the graph shown. It’s possible that the platform has marked something incorrectly due to formatting or another minor issue. Try re-entering the answers to ensure they align precisely with the expected format.

If you have further questions or want explanations on similar problems, let me know.

Here are five related questions that could expand your understanding:

1. How can you find the axis of symmetry for a parabola algebraically?
2. What does it mean for a function to have a maximum or minimum in practical applications?
3. How can you determine the concavity of a quadratic function from its equation?
4. How are the vertex and axis of symmetry related in any parabola?
5. How do you calculate the y-intercept of a quadratic function?

Tip: Always double-check the format and units required in answer fields on online platforms, as these can sometimes cause answers to be marked incorrect even when they're correct.