Answer:
Cell division
Step-by-step explanation:
Cell division is the process of splitting one cell into two identical daughter cells for growth and repair. This cell division is often called mitosis.
Cellular respiration is about converting food into usable energy, and it has nothing to do with creating new cells.
Photosynthesis is the process in autotrophic organisms where they convert the sun energy into sugar as food. Again, this has nothing to do with creating new cells.
Finally reparation is the process of repairing damaged cells; while this can involve creating new cells from existing cells, it's not the official process.
Thus, the answer is A.
Hope this helps!