The hypothesis is the question you are trying to answer or the problem you need to figure out, it is kind of like a starting point
Honestly it would be the Exosphere<span> but since that's not one of the choices it would be the Thermosphere. </span>
From the brightness of the light of course. If the brightness is increasing it means the the light source is approaching and if the brightness is decreasing it means the light source is leaving.
Answer:
In pharmacology, the term mechanism of action (MOA) refers to the specific biochemical interaction through which a drug substance produces its pharmacological effect. A mechanism of action usually includes mention of the specific molecular targets to which the drug binds, such as an enzyme or receptor.