Distribution of the distance to the first nearest neighbor, nnd, from YSOs to clumps (panels a and c) and from clumps to YSOs (panels b and d). The YSOs are Class 0/I in the upper panels (a and b), Class II in the lower panels (c and d). Distributions are presented for the central subregion (hatched black histograms) and for the northern and southern subregions, combined in the upper panel (purple histogram) and separated in the lower panel (red and blue histograms, respectively). Distributions are normalized to facilitate the comparison involving small populations of YSOs (Class 0/I from northern and southern subregions in panel a, Class II from southern subregions in panel c). The dashedvertical red line indicates the median outer radius of clumps, calculated as twice the median FWHM: pc.