Synthesize the role of stem cells in the context of tissue repair and regeneration.

• A. Stem cells are responsible for energy storage in tissues.
• B. Stem cells are primarily involved in immune response rather than tissue repair.
• C. Stem cells only function during embryonic development and have no role in adult tissue repair.
• D. Stem cells provide a continuous supply of new cells to replace damaged or dead cells, facilitating tissue repair and regeneration.

Answer: (D)