Biology · Transport

The correct answer is Phagocytosis. This is the process by which certain cells, such as white blood cells, ingest or engulf other cells or particles, including foreign bodies. White blood cells use phagocytosis to clear the bloodstream of pathogens and debris. Pinocytosis and osmosis do not involve engulfing particles; exocytosis is the expulsion of materials, and 'None' is incorrect as phagocytosis is the appropriate process.

Pinocytosis is a process where cells take in fluids and dissolved substances through small vesicles. It is not involved in engulfing large particles or cells.

Exocytosis is the process by which cells expel materials out of the cell, not engulf them.

Phagocytosis is the process by which certain living cells called phagocytes ingest or engulf other cells or particles. It is a key mechanism used by white blood cells to remove foreign bodies from the bloodstream.

Osmosis refers to the movement of water across a semipermeable membrane from a region of low solute concentration to a region of high solute concentration.

This option is incorrect as phagocytosis is indeed the process involved in the scenario described.