Answer: I believe it's the mitochondria!
Answer:
An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms.
Im not really sure how to answer your question but I hope this helps.
B. transport oxygen to tissues
C) His work proving that unseen bacteria can cause disease.
Stress is a force that acts on a rock to change its shape or volume.
