The ring’s origin was in the beginning connected to the missing moon Dia, but Dia’s recovery in 2010 disproved this link. One of only two Martian moons, Phobos is described as no more than a tiny rock. NASA also notes that Phobos is on the collision study course with Mars. https://moons67554.getblogs.net/67266816/5-easy-facts-about-best-moons-described