By siltation, as part of the bed load
Proximity means close to you. For example A few yards. Its proximity to the sun in its passage near that body.
Explanation:
Geography (from Greek: γεωγραφία, geographia, literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and phenomena of the Earth and planets. ... Geography has been called "the world discipline" and "the bridge between the human and the physical sciences".
New Guinea is administratively divided into two parts: its western half comprises the Indonesian propinsi (or provinsi; provinces) of Papua and West Papua (collectively, formerly called Irian Jaya); and its eastern half comprises the major part of Papua New Guinea, an independent country since 1975.