Drops

Drops are items that appear when mobs and some other entities die or when most kinds of blocks are broken.

Mobs do not drop any of the following if the game rule mob_drops‌[JE only] or domobloot‌[BE only] is set to false.

Common drops may appear at the location of a mob at the moment it receives fatal damage. Most mobs have certain items that they may drop when killed. Some common drops, such as leather, don't always drop, but have a large chance (at least 50%, depending on the drop range) to do so. Some common drops, such as blaze rods, don't drop at all if the mob was not killed by the player.