Final answer:
The statement not included in Ravenstein's Laws of Migration is the belief that migration from less developed countries increases during economic recessions in more developed countries.
Step-by-step explanation:
The option that is NOT part of Ravenstein's Laws of Migration is (E) Migration from Less Developed Countries rapidly increases when economies take a downturn into recession in More Developed Countries. Ravenstein's laws, developed by British geographer E.G. Ravenstein in the late 19th century, include principles about the distance of migration (Friction of Distance), the process of migration (Step Migration), and how large cities tend to attract more migrants (Gravity Model). However, the claim about migration patterns changing in response to economic downturns in More Developed Countries is not part of his original set of laws.