Answer:
A growth light is an artificial light source designed to stimulate plant growth by emitting a light appropriate for photosynthesis.
It is used when there is no natural light available or supplemental light is needed.
Estrogen is a female hormone and testosterone is a male hormone. Therefore, neither can control hunger since both genders experience this. Epinephrine is just another word for adrenaline. So, your answer is D, ghrelin.
A. Geologist → rocks around and under the hot spring
B. ecologist → relationships between organisms and the hot spring
C. sociologist → human behavior around the hot spring
D. meteorologist → atmosphere and weather around the hot spring