Yes, ''to'' is a preposition. It is commonly used to indicate direction, location, or relationship between items in a sentence.
Complex
what peposition with word profit
The simple subject is "islands", the complete subject is "Some islands", and both "off" and "of" are prepositions.
Don't put the peposition at the end of a sentence. Good luck at Slippery Rock LOSER. YOU ARE NOT GOING TO SUCCEED IN LIFE. WHAT IS YOUR GPA? 1.5. LOOOOSSSSEEEERRRR!!!!!!!