Question

which structure is responsible for controlling substances that enter and leave the cell?

Explanation:

The cell - membrane is responsible for controlling substances that enter and leave the cell. It is a selectively - permeable barrier. Without seeing the labeled options clearly, but based on cell - organelle functions, we know the answer should be related to the cell - membrane. If the images represent organelles like mitochondria (first image), chloroplast (second image if applicable), endoplasmic reticulum (third image), and Golgi apparatus (fourth image), none of these directly control substance entry and exit like the cell - membrane does.

Answer:

The cell - membrane (assuming it is an option not clearly shown in the provided image)