 
<translate> Don a amsa wannan tambayar, ka yi la'akari da wannan: A kan iyakar farfajiyar da ta rabu, an kafa kwarin da ya rabu, kuma hakan ya sa farfajiyar ta yaɗu, kuma hakan ya sa ta ƙara zurfafawa. Don haka, amsar ita ce iyakar farantin da ya bambanta. <eng> To answer the question, consider the following: A rift valley is formed on a divergent plate boundary, a crustal extension, a spreading apart of the surface, which is subsequently further deepened by the forces of erosion. So, the answer is a divergent plate boundary. 