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.
The answer to this question is the science of forensic study
Answer:
Nervous System
Explanation:
I'd argue the nervous system because you sense pain through your nerves and when you realize something is poking you bam your nerves recognize it and tell your brain "UH OH CHEIF THERE'S A TACK" and you pull it out.
Spartans were trained from the time they were seven years old to be warriors. Girls as well as boys were taught in the art of war. The Spartans also lived a very austere lifestyle so that they would be used to long millitary campaigns.
