Approximate feeding width of the embryos, depicting the final semi-major axis (x) vs the mass-weighted mean semi-major axis of the accreted material (y). The vertical error bars show the standard deviation and/or range of the feeding zones. There is a clear correlation between the final and mass-weighted semi-major axis, showing that accretion is still mostly from the inner Solar System, but with a large random component due to stochastic accretion of some outer Solar System material. The colour-coding indicates the initial semi-major axis of the embryo. For some small embryos this value is large because they came from beyond the composition changeover distance and went through a few mergers with material from the outer region. The accretion zones of all embryos overlap.