Question

how do lysosomes help white blood cells?
assisting in the breakdown of bacterial cell walls
by heat shocking and killing bacteria
by completely engulfing bacteria and shredding it

Explanation:

Lysosomes contain digestive enzymes. White blood cells (like phagocytes) engulf bacteria (a process called phagocytosis). The lysosomes then fuse with the phagosome (the vesicle containing the engulfed bacteria). The enzymes in the lysosomes break down the bacterial cell walls and other components of the bacteria. Heat - shocking is not a function of lysosomes in this context. Engulfing is mainly done by the cell membrane (forming the phagosome), and lysosomes assist in the breakdown rather than the complete engulfing.

Answer:

assisting in the breakdown of bacterial cell walls