Answer: Chloroplast
Explanation:
Plants use photosynthesis to make energy for themselves and this process is located in the chloroplast. If you can't remember this, you might remember the name chlorophyll which is the food a plant makes. The prefix is similar as you can see.
Oxygen
Oxygen is the final electron acceptor, no part of the process - from the Krebs Cycle through the electron transport chain- can happen without oxygen. Aerobic respiration is complete
