How are the cytoskeletal proteins involved in cell division?

Besides the intracellular movement of organelles, the cytoskeleton is responsible for chromosome movement during cell division and for cytokinesis. This intricate network of protein filaments, which runs throughout cytoplasm, makes up a dynamic, continuously reorganizing framework, not a static scaffolding.

Explanation:

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely