The correct answer is B. Mitochondria.
Mitochondria are organelles found in the cytoplasm of eukaryotic cells. They are responsible for energy production in the cell, which is essential for all cellular processes. Cellular respiration is a series of chemical reactions that occur in the mitochondria to produce ATP, the cell’s main energy source.
The cytoplasm is the jelly-like substance that fills the cell. It is made up of water, proteins, carbohydrates, lipids, and other molecules. The cytoplasm is where many of the cell’s chemical reactions take place.
Ribosomes are organelles that are found in the cytoplasm. They are responsible for protein synthesis. Proteins are essential for all cellular processes.
Chromosomes are found in the nucleus of the cell. They are made up of DNA, which is the genetic material of the cell. DNA contains the instructions for all of the cell’s proteins.