I think 2 but I’m not very sure
Answer:
D, form rings and chaines i think
Explanation:
This allows the Carbon to form long chians with elements such as hydrogen and phosphorus, etc, used some info from this site
https://courses.lumenlearning.com/wm-nmbiology1/chapter/carbon-and-carbon-bonding/
if my answer helps please mark as brainliest.
Optical nervous system pathway information travel from the eye
Answer:
The nervous system is comprised of two major subdivisions, the central nervous system (CNS) and the peripheral nervous system (PNS).
Explanation: