If a cell did not have these parts, it might have difficulty moving around.

Acilia and flagella
Bribosomes and nucleus
Ccilia and cytoskeleton
Dmitochondria and cytoplasm

Verified Answer :

That would be A. cilia are little hair-like things on cells that help the cell tell where it is (kinda like little nerves, almost.) and the flagella are long strings that are used to propel a cell forward (kinda like a motor boat).

Gaea99

cilia for Plant cell
and
flagella for animal cell
in order for them to move smoothly.