Which organelle is responsible for digesting materials and cleaning up the cell of wastes?

Lysosomes

Explanation:

Lysosome are among the organelles in a eukaryotic cell. Lysosomes are formed by the golgi bodies or the golgi apparatus.The role of lysosomes is to digest and destroy old and worn out organelles together with cellular wastes. In other words Lysosomes break down food molecules, waste products, and old worn out cells or organelles.They contain powerful lytic enzymes and and acids which help in the digestion and recycling of cellular materials.

Gravitational force i believe