allow the flow
of electrical impulses, or
signals, to and from the
brain.
A. Arteries
B. Veins
C. Vessels
D. Nerves

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

c. heat from the poles back down towards the equator.

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).