Which of the following explosive characteristics enhances handling and emplacing?

The characteristic that enhances handling and emplacing of explosives is their convenient shape for packing and storage. Explosives that are designed in a way that allows them to be packed efficiently can significantly simplify logistics involved in transportation and deployment. A shape that fits well into storage containers minimizes wasted space, making it easier to manage and transport larger quantities. This is especially important in military and engineering applications, where operational efficiency is crucial.

In contrast, while biocompatibility, visibility, and cleanliness of burn are important traits for certain applications, they do not directly pertain to the practical aspects involved in the physical handling and storage of explosives. For instance, biodegradability could be relevant for environmental concerns but does not make explosives easier to handle. Similarly, brightness in color might help with visibility but does not contribute to the functional ease of emplacing the materials in the field. Clean burning without residue is also significant for safety and environmental reasons, but it does not influence how conveniently the explosives can be stored or transported.