<span>skin, hair, nails, hope this helps</span>
Answer: c. Prospective cohort study
Explanation:
Prospective cohort study is a type of observational study which is used to study large number of subjects which are similar but vary with respect to certain factors required to be considered under the study. This is done to determine how these factors affect the rates of certain outcomes. The subjects are studied under different frames.
Here, in the given study the subjects are the same which is a group of middle aged men. These are at a risk of premature ventricular contractions thus are at greater risk of myocardial infraction as compared to men those heartbeats are regular. Here there are different factors to be observed upon and the subjects are also studied in different time frames thus this condition is an example of prospective cohort study.
Answer: B the two continents were once part of one larger continent
Explanation:
When groundwater is depleted, the ground surface above can sink down over time. This is called Land Subsistence. Thus, option "D" is correct.
<h3>What causes subsidence?</h3>
Subsidence is a phenomenon of lowering of the ground surface due to changes in the underground support. The phenomenon occurs in several places in the world due to the
- extraction of water
- oil
- and gas from the subsoil.
With this information, we can conclude that Land subsidence is related to human population growth.
Thus, option "D" is correct.
To learn more about Land subsidence click here:
brainly.com/question/20018907
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