The correct answer is mitochondria. Mitochondria is an organelle in the cell that corresponds to the function of the human lungs.It helps the lungs in the biochemical process of respiration and with the energy production (cellular respiration.)
B is the nucleoid
D is Ribosomes
Hope this helps :)
When it comes to the environment and the oceans ecosystem whales help regulate the flow of food by helping to maintain a stable food chain and ensuring that certain animal species do not overpopulate the ocean.
A nebula is an interstellar cloud of "Dust and Gas"