Final answer:
Animal cell structures enable movement by maintaining cell shape, securing organelles, allowing internal cellular movement, and supporting the function of locomotion in multicellular organisms through muscle contractions.
Step-by-step explanation:
The structure of animal cells allows for movement in several ways. The cytoskeleton maintains the cell's shape, secures organelles in specific positions, and allows movement of cytoplasm and vesicles within the cell. This is crucial because these movements permit cells to change shape, contract, and even move the entire organism in the case of muscle cells. For single-celled organisms, the cytoskeleton also enables unicellular organisms to move independently, leading to locomotion. Additionally, specialized cells and tissues support the function of locomotion, for instance, muscle cells contain actin and myosin that slide past each other to cause muscle contraction and thus enable movement.