I believe the answer is a prokaryote.
What are your choices?
EDIT
The answer you are looking for would be wood.
Hope I helped!!
Cellular respiration is the process cells use to make energy. Cells in our body combine glucose and oxygen to make ATP and carbon dioxide. Cellular respiration starts with glycolysis, where glucose enters the cell, is converted to pyruvate, and makes a few ATP and NADH.
Oil 2 hydro electric 3 nucler power 4