The abiotic factor is the amount of oxygen. Abiotic means non-living, and all the other answer choices reference living things.
If you need more help, comment below and I'd be happy to assist.
It turns into sugar which is fuel for the plant
I hope I helped
I found some articles on the internet that may be helpful (took me three minutes of searching). Hope these help?
http://www.huffingtonpost.com/ravishly/neuroscience-proves-what-_b_6494820.html
http://sitn.hms.harvard.edu/flash/2016/gender-lines-science-transgender-identity/
Nerves - transmit impulse of sensation to brain or spinal cord, then to muscles and organs
