Final Answer:
Haiti is 1/3 of Hispaniola and in the Greater Antilles.
Step-by-step explanation:
Haiti, located in the Caribbean, occupies one-third of the island of Hispaniola, sharing the landmass with the Dominican Republic. The Greater Antilles, a major island group in the Caribbean, includes Cuba, Jamaica, Puerto Rico, the Dominican Republic, and Haiti. Hispaniola is the second-largest island in the Greater Antilles, making Haiti part of this significant island cluster.
In summary, Haiti fulfills the criteria of being one-third of Hispaniola and is situated in the Greater Antilles.