There must be a description of the ball and its environment, somewhere earlier on the sheet where we can't see it. We don't know what the conditions and environment are around the ball as it moves downward. So I can only answer in the most general way, and make up some scenarios.
If the ball is falling from an airplane, then it has to use some of its energy to push air out of the way, and even then, it loses some more energy as the air molecules scrape against its side. This is all called 'air resistance'. It's a form of friction, the form that takes energy away from anything that's moving through air.
If the ball is rolling across the lawn, then it takes some energy to bend the blades of grass down along its path. That's why a ball that's rolling anywhere on Earth always stops, although Newton's laws of motion say that an object in motion always keeps moving and doesn't stop.
The type of balls that sink are the ones that are quite heavy because they have molecules that are dense inside of them that makes it sink. Hope it helps!!!
Yellow dwarfs are small, main sequence stars. The Sun is a yellow dwarf. A red dwarf is a small, cool, very faint, main sequence star whose surface temperature is under about 4,000 K. Red dwarfs are the most common type of star. Proxima Centauri is a red dwarf.
