When an animal cell is surrounded by a medium with a lower concentration of water, the water will move from an area of higher concentration (inside the cell) to an area of lower concentration (outside the cell). This process, known as osmosis, will result in the cell losing water.

Option 1: Cell will lose water - This is the correct answer. As explained above, when the medium surrounding the cell has a lower concentration of water, water will leave the cell, causing it to lose water.

Option 2: No change in movement of water - This option is incorrect. When there is a difference in the concentration of water between the cell and its surroundings, water will always move from an area of higher concentration to lower concentration.

Option 3: Cell will gain water - This option is incorrect. When the medium surrounding the cell has a lower concentration of water, water will leave the cell, causing it to lose water rather than gain water.

Option 4: Cell will swell up - This option is incorrect. When the cell loses water through osmosis, it will shrink or shrivel, rather than swell up.

In summary, when an animal cell is surrounded by a medium with a lower concentration of water, the water will move out of the cell