2 - Free Printable

Problem Analysis:

The task involves identifying the correct shape to fill the missing space in the pink grid. The grid contains three black triangles, and we need to determine which shape from the given options (1 through 6) should logically fit in the empty space.

Observations:

1. The grid is a 2x2 layout with three black triangles already placed.
2. The shapes in the options are:
- 1: A black triangle.
- 2: A circle.
- 3: Wavy lines.
- 4: A pentagon.
- 5: A large black triangle.
- 6: A star.

Logical Reasoning:

- The existing shapes in the grid are all triangles.
- The pattern suggests that the missing shape should also be a triangle to maintain consistency.
- Among the options, only Option 1 is a triangle.

Conclusion:

The correct shape to fill the missing space is Option 1, which is a black triangle.

Final Answer:

$$
\boxed{1}
$$