Biology

The correct answer is D.Carbon dioxide.

Carbon dioxide (CO₂) is a waste product of cellular respiration and diffuses out of the cell into the surrounding environment. It moves from an area of higher concentration inside the cell to an area of lower concentration outside the cell, typically through simple diffusion across the cell membrane.

Here’s why the other options are not correct for this question:

A.Amino acids: These are essential nutrients for cells and generally enter the cell via active or facilitated transport, not diffusing out.

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