When an animal cell is placed in a hypotonic environment, it will:

Explanation

When an animal cell is placed in a hypotonic environment, it will undergo cytolysis. Here's why:Hypotonic Environment: A hypotonic environment has a lower solute concentration (and therefore a higher water concentration) than the inside of the cell.Osmosis: Water moves across the cell membrane from an area of high water concentration (outside the cell) to an area of low water concentration (inside the cell) through osmosis.Cytolysis: As water enters the animal cell, it swells. Unlike plant cells, animal cells lack a rigid cell wall. The cell membrane can only stretch so much. If too much water enters, the cell membrane will burst, a process called cytolysis (or osmotic lysis).Here's why the other options are incorrect:Be at equilibrium: Equilibrium occurs in an isotonic environment, where the solute concentration is the same inside and outside the cell.Undergo plasmolysis: Plasmolysis occurs in a hypertonic environment, where the solute concentration is higher outside the cell. Water moves out of the cell, causing the cell membrane to shrink away from the cell wall (in plant cells). Since animal cells don't have a cell wall, they simply shrink.Therefore, the correct answer is undergo cytolysis.