Which type of eraser is firm and more precise but can still leave crumbs?

The pink eraser is known for its firmness and precision, making it an excellent choice for erasing pencil marks cleanly and accurately. This type of eraser is designed to handle detailed work, especially in situations where control over the erasing process is important, such as in drawing or detailed sketching.

While it effectively removes graphite from the paper, it can sometimes leave small crumbs or shavings as it works. This characteristic comes from the material's composition, where the firmness allows it to lift marks efficiently but can also result in the production of these small eraser residues.

In contrast, kneaded rubber erasers are more pliable and can be shaped into different forms for more controlled erasing, but they don't create the same level of precision in terms of hard edges. Gum erasers are softer and tend to be less precise, making them better for larger areas but not ideal for detailed work. Vine charcoal is not an eraser at all; it's a drawing medium. Therefore, the pink eraser stands out as the most suitable answer due to its precise nature while still being able to leave behind crumbs.