<span>Depletion of the ozone layer has consequences on humans, animals and plants. This typically results from higher UV levels reaching us on earth.
Research confirms that high levels of UV Rays cause non-melanoma skin
cancer. Additionally, it plays a major role in malignant melanoma
development.</span>
thomas edison was a good one or professor edison if you may
Which planets do scientist beleive prevented the astroieds in the astrioed belt from forming a planet
jupiter
Answer:
The correct option is;
D) Observational study
Explanation:
In an observational study, the researcher observes, notes and record the an occurrence of events which are due to the existence of a condition, test, risk factor, such that the experimental units are apparently out of the control of the researcher, or there are no researcher intervention in the study, due to either physical constraint or laid down ethics.
In the question, the researcher observes to determine the the number of people that run a light through pre recorded traffic video providing a physical restraint which makes it an observational study.
