Answer:
pls I don't understand pls explain
Answer:
the second to last one. the one that starts with a situation
Answer:
sample
Explanation:
sample in research experiments means when researcher can not include and involve whole population than he or she choose representative sample which represent whole population, and result of experiment can be generalize whole population. Sample must have some characteristics like it must be random and not biased so results get not affected.
I think the answer is out of the above
