I'm gonna go off on a limb here and say a painting. Hope that helped!
I think it's American Psychological Association
The answer is b. False.
A Naturalistic Study is defined to be a type of study<span> in which the researcher very carefully observes and records some behavior or phenomenon, sometimes over a prolonged period, in its natural setting while interfering as little as possible with the subjects or phenomena. There is no manipulation done, so it does not give reliable understanding of an individual.</span>
An interval may be described as horizontal, linear, or melodic in the music world, if that's what you were referring to.