Concept:The Felahin were native Egyptian peasants whose support gave Mohammed Ali local strength to take power.Explanation:The Felahin were ordinary Egyptian farmers and agricultural labourers.They were unhappy with Mamluks’ control and favoured Mohammed Ali’s reforms.Their widespread support gave Mohammed Ali legitimacy among the Egyptian people.This popular backing helped him weaken the Mamluks and take firm hold of the country.Therefore, the support of the Felahin helped him attain effective control of Egypt.Answer:C. gain effective control of Egypt