Final answer:
Hollow point or soft point bullets for hunting are designed to expand upon impact, which ensures a humane kill by causing more damage and transferring more energy to the target.
Step-by-step explanation:
The blanks in the question are meant to be filled with the word expand. Bullets used for hunting with soft or hollow points are designed to expand, or "mushroom", upon impact. This is to ensure that the bullet transfers as much energy as possible to the target, causing more damage and increasing the likelihood of a quick and humane kill. This expansion can be vital for hunters aiming to reduce the suffering of the game and comply with ethical hunting practices.