Near the end of both March and September, a. spring begins in both hemispheres.
b. the sun's rays strike Earth with the same intensity everywhere.
Earth's axis is no longer pointing at the North Star.
d. neither end of Earth's axis is tilted toward the sun.
c.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.