Concept:The common feature shared by both plant and animal cells is the presence of a nucleus, which controls cell activities and stores genetic material.
Explanation:Plant cells possess chloroplasts, a cell wall, and a large vacuole, while animal cells generally do not have these structures.
Centrioles are found mainly in animal cells and are absent in most higher plant cells.
However, both plant and animal cells contain a nucleus.
The nucleus is a membrane-bound organelle surrounded by a double nuclear membrane that has pores.
It contains genes and controls vital processes such as growth and metabolism.
Since the nucleus is present in both cell types, it is the common structure among the given options.
Answer:C. nucleus