Explanation:

Here’s the thing—let’s break down all four options and clear up what each does.

- Plastids: These are only in plants and algae. They do things like photosynthesis (think chloroplasts). Animal cells don’t have them.

- Cytosol: This isn't an organelle at all—it's just the fluid part of the cytoplasm where everything else floats around.

- Golgi apparatus: This stacks, tags, and ships proteins and lipids. It helps modify and transport stuff, not exactly separating waste.

- Vacuoles: In animals, vacuoles are small. They do help store and separate waste products. In plants, they’re huge; in animals, they're more about keeping the cell tidy by getting rid of waste.

So, . Vacuoles fit your description—they’re the ones separating out waste in animal cells.