Answer:
Dissociative fugue
Explanation:
Based on the scenario that is being described, it seems that the man is most likely suffering from Dissociative fugue. This is a psychological state that was formerly known as a psychogenic fugue. This state is characterized as when an individual loses awareness of their identity or any/all other important autobiographical information, while also engaging in some form of unexpected travel. Which would explain why the man in this scenario does not know who he is and has traveled far from where he actually lives.
Voyager 2
On November 5, 2018, Voyager 2 officially left the solar system as it crossed the heliopause, the boundary that marks the end of the heliosphere and the beginning of interstellar space.
Answer: It's an EXPERIMENT
Explanation: Experiment is done when we apply anything to a samples or conditions in other to study another sample or conditions.
Observation is done when, we study samples or conditions in it's natural way, without application of anything that may alter it's result.
Because the researcher has applied fertilizer to one side and did not apply to the other side, that means he has performed an experiment. Since he wasn't observing the two sample in it's natural way without any external application.
I think the answer would be a
