Answer:
D) The transfer of peoples, diseases, plants, and animals between the new old worlds.
Answer:
To provide for the material needs of individuals and families; To protect aged and disabled persons against the expenses of illnesses that may otherwise use up their savings
Explanation:
Answer:
The description corresponds to an observational study.
Explanation:
In Observational studies, researchers observe the effect of a risk factor without changing what is exposed to it or its conditions. On the other hand, in an experimental study, researchers can introduce a change and study the effects of it.
