Answer: MITOCHONDRIA: cell respiration
ENDOPLASMIC RETICULUM: transport &making organelles and proteins
Step-by-step explanation:
Mitochondria are used for cell respiration, which is the process that gathers oxygen. This oxygen is then burned by the mitochondria and turned into energy.
Smooth ER's are used for making organelles.
Rough ER's are used to make proteins, as well as for transport.