Final answer:
The organelle comparable to a stadium's control center is the nucleus, as it houses the cell's DNA and regulates its functions.
Step-by-step explanation:
The organelle that is like the "press box" or "control center" of a stadium is b. Nucleus. The nucleus is considered the cell's control center because it contains the cell's genetic material, or DNA, which commands all cellular functions. It is enclosed within a double membrane and regulates gene expression by controlling which proteins the cell makes. Comparing it to the control center in a stadium, where decisions are made and operations are overseen, the nucleus similarly directs the activity of the cell.