The correct option is C Centriole
The centrioles and aster are present in animal cells but absent in plant cells. Centrosomes take part in the formation of centrioles. The centrioles are the centers for the synthesis of microtubules. They are required for spindle fibre formation during cell division. The aster is the star-like structure present around the centriole. This is the portion from where the spindle fibers get distributed on all the sides. Thus, the correct answer is option C.