The correct answer is: Passive transport moved water into the cells before or after death.
Passive transport is the movement of molecules across a cell membrane without the use of energy. One type of passive transport is osmosis, which is the diffusion of water across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration. If a body is found in the water and has water inside all of its cells, it means that the water outside the cells had a higher concentration than the water inside the cells, and osmosis occurred. This could have happened before or after death, depending on how long the body was in the water and how much water was in the cells before immersion.
The other options are incorrect because:
- Active transport is the movement of molecules across a cell membrane with the use of energy. Active transport requires living cells that can produce energy and transport proteins. Therefore, active transport cannot move water into the cells after death, when the cells are no longer alive and functioning.
- Passive transport was not working before or after death is a false statement, because passive transport does not require living cells or energy. Passive transport can occur before or after death, as long as there is a concentration gradient between the inside and outside of the cells.
- Active transport was not working before or after death is a true statement, but it does not explain why there is water inside all of the cells. Active transport stops working when the cells die and can no longer produce energy or transport proteins. However, active transport is not responsible for moving water into the cells in this scenario.