If a cell did not have these parts, it might have difficulty moving around.
a. cilia and flagella
b. ribosomes and nucleus
c. cilia and cytoskeleton
d. mitochondria and cytoplasm
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).
