Siddhartha Gautama attained enlightenment (Bodhi) while meditating under a Pipal (fig) tree in Bodh Gaya, India. This event is central to Buddhism, as it marked his transformation into the Buddha (the Awakened One). It is where Buddha attained enlightenment fits that evidence because it matches the specific chronology, agency and function contained in the question. A comparison with the alternatives is useful: It is where Buddha was born, It is where Buddha delivered his first sermon and It is where Buddha passed away are genuine historical terms or names, but each belongs to a different office, patron, text, region or sequence. The compact memory link is therefore It is where Buddha attained enlightenment together with the factual context above, not the isolated option letter.