Letter B in the cell diagram illustrating a stage of mitotic cell division indicates the centrioles.
One of the main functions of the centrioles during cell division in the animal cell is to help in the formation of spindle fibers.
The fibers attach to chromosomes at the centromeres during metaphase and their shortening leads to the pulling apart of sister chromatids. Continuous shortening helps chromatids to complete their migrations to the poles.
Centrioles are vital parts of the centrosomes and are found only in animals, fungi, and some algal cells. In the diagram, the two centrioles can be seen at the two poles of the cell.
More on the centrioles can be found here: https://brainly.com/question/909799
