Answer:
The living components of the environment are known as biotic factors
Explanation:
Biotic factors include plants, animals, and micro-organisms. The non-living components of the environment are known as abiotic factors. Abiotic factors include things such as rocks,water,soil,light,rocks etc...
Because each carbon is identical, they all have four valence electrons, so they can easily bond with other carbon atoms to form long chains or rings. (Hoping that helps)
Answer: I believe it would be A: epithelial cell, intestinal lining, intestine, digestive system, human body.
Hope this helps!!
It is b or the second answer choice shown
