If a saltwater fish is placed in freshwater, its cells will do which the following? a Lose water. b Take up water. C Neither gain nor lose water.

## Step 1
The problem is about the biological process of osmosis. Osmosis is the movement of water molecules from an area of lower solute concentration to an area of higher solute concentration across a semi-permeable membrane.

## Step 2
In this case, the saltwater fish is placed in freshwater. The cells of the fish have a higher solute concentration (salt) than the freshwater.

## Step 3
According to the principle of osmosis, water will move from the freshwater (lower solute concentration) into the cells of the fish (higher solute concentration). This is because the cells of the fish have a higher solute concentration than the freshwater.