Answer:
Cell wall - protect / Nucleus - control
Step-by-step explanation:
The cell wall's main function is protection against external pathogens and prevents excessive water entry into the cell.
The cell nucleus is where the DNA is located. The nucleus has as its main functions the control of chemical reactions and storage of genetic material.
As for the vacuoles, they do not act in the transport, but in the storage of substances.
Finally, mitochondria do not decompose. They act on cellular respiration, converting glucose into energy for cells.