The right option is; Nucleus
Nucleus is a structure that contains the cell’s hereditary information and controls the cell’s growth and reproduction.
The nucleus of a cell is an organelle that contains chromosomes (composed of DNA) which contains the cell's hereditary information that controls the cell's growth and reproduction. Nucleus is the most important structure in the cell as it controls all the activities of the cell. The nucleus is surrounded by the nuclear envelope which separates its content from that of the cell’s cytoplasm.