Answer:
Yes
Explanation:
It is the indicator of human health which is a Sustainable Development Goal of a UN.
If health is good other indicators of progress will improve with it. Like if there is improvement in child care, there will less morbidity and mortality rate which result in less consumption on child health in total.
Healthy child can compete brilliantly and excels in education which is enlisted as an other UN SDGs.
The answer is orangutan or psychology
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.