The nature of gravity is currently described by Einstein's theory of general relativity, which presents gravity as the curvature of spacetime caused by the presence of matter and energy. In this framework, gravity is not understood in terms of particles or waves in the way that other fundamental forces like electromagnetism are described.
In general relativity, massive objects, such as stars or planets, cause spacetime to curve, and the motion of other objects, including light, is influenced by this curvature. This description has been extremely successful in explaining a wide range of phenomena, from the motion of planets to the bending of starlight by gravity.
However, there have been ongoing efforts to reconcile general relativity with quantum mechanics, which describes the behavior of particles and waves on very small scales. This quest for a theory of quantum gravity is driven by the desire to understand how gravity behaves at the quantum level and to potentially unify all the fundamental forces into a single framework.
Several approaches to quantum gravity have been proposed, such as string theory, loop quantum gravity, and others. These theories explore the possibility of describing gravity in terms of particles or waves at the fundamental level. However, it is important to note that these theories are still highly speculative, and a complete and experimentally validated understanding of quantum gravity is yet to be achieved.
Therefore, at present, the nature of gravity as described by general relativity does not fit into the traditional framework of particles or waves like other fundamental forces. Whether a fundamentally different description is required or if it can eventually be incorporated into a unified framework with other forces remains an active area of research and a subject of ongoing scientific investigation.