The definition of a defendant is someone being tried in a court of law. May be criminal or civil.
The answer is a Natural Experiment.
A natural experiment takes place in natural settings and are used when independent variables can't be manipulated directly for ethical/practical reasons, so in this case the toddlers playing. Any effect observed happens naturally. They aren't seen as true experiments as the independent variable (toddlers playing) hasn't been changed deliberately to see effect on dependent variable (aggressiveness).
Answer:
The first objective lens that someone should first use to view a slide is the 4x magnification objective lens.
Explanation:
- This is because the 4x magnification objective lens has got the lowest magnification power.
- This in turn means that it has the highest field of view.
- This in turn makes it easier to locate the specimen first before switching to lenses with higher magnification power for focus after finding the location of the specimen.