The answer is: A. hurricanes
Answer:Why do classification systems change over time? When scientist find new species that may have to change classification systems in order to accommodate them. DNA sequencing has also let us find out more about evolutionary relationships. ... This means that scientists have to change the way they classify them.
Explanation:
The correlational method is a research method in which two variables are measured for each participant and the extent to which those variables are related is measured.
Answer:
D.
Explanation
because they need to be imported d would be the correct answer
The workers were being exploited by the upper class who controlled wealth and the means of production.