Food chains are for example something that another thing eats and it goes down to many different selections and starts off big and vies to small things
The interactions of the ecosystems are all part of the biosphere. The organisms in the biosphere interact with each of the other abiotic physical systems, namely the hydrosphere, the atmosphere and the lithosphere. These interactions not only shape the nature of the ecosystems, but also affect the geology and geography of the system.
I think that the answer would be b or c but i would go with c
Answer:plz mark me as a brainlist
Explanation:
The lower esophageal sphincter (LES) is a bundle of muscles at the low end of the esophagus, where it meets the stomach.