At least three variables that are measured and recorded to provide climate data?

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

ingenuity says that the answer is 2.7 m.