two models of sells are shown below. Why would model b be better for moving nutrients in and out of the cell?

The correct answer is - C. It has a larger ratio of surface area to volume.

Explanation:

In cell B, the ratio of surface area to volume is larger in comparison to cell A. The surface area to volume ratio can be understood as it is the size of surface area that the volume of a particular substance can move in or out of the cell, in a unit of time.

Thus the larger the ratio of surface area to volume faster the diffusion rate of nutrients will be as the surface area is a square measurement and volume is cubed so the surface area increases faster than volume.

coal is not sustainable because it will one day run out.