Answer:
D. A cube
Explanation:
Epithelium cells are a type of cell that has a simple cuboidal epithelium that consists of only a single layer of cells that are cube-like or cuboidal in shape. These cells have large, spherical nuclei present in the center. These cells are cube-shaped cells
Fixed action patterns are <span>behaviors that follow a fixed, unvarying pattern and are used in accordance to studying animals and their behaviors to both the environment and each other. </span>
