Panels show the median correlation coefficients for each molecular line (labeled to the left of each panel) and different source parameters, with error bars representing one standard deviation. Marker colors map to the color bar representing the correlation coefficient, with positive values in purple and negative values in green. The horizontal axis is labeled by the source parameters tested for correlations, including stellar mass, mass accretion rate, stellar X-ray luminosity, HCO⁺ flux, H¹³CO⁺ flux, 0.9 mm continuum flux, and ¹³CO flux from left to right.