Plant cells possess both cytoplasm and cell walls, unlike animal cells.

Steps:

• Classify each option as animal or plant origin.
• Recall animal cells lack cell walls but have cytoplasm.
• Recall plant cells have both rigid cell walls and cytoplasm.
• Evaluate xylem vessels as specialized dead plant structures.

Why C is correct:

• Root hair cells are living plant cells, defined by having a cellulose cell wall for support and cytoplasm for metabolic functions.

Why the others are wrong:

• A: Red blood cells are animal cells without cell walls, only plasma membranes.
• B: Liver cells are animal cells lacking cell walls.
• D: Xylem vessels are dead, hollow plant tubes without cytoplasm.

Final answer: C