Research Summary passage: A salt-marsh transect crossed areas flooded for different numbers of hours each day. The data representation uses separate scales for each panel. Panel A plots grass height (cm) against daily flood time (hr); data are 0=34; 2=39; 4=42; 6=39; 8=34. Panel B plots soil salinity (ppt) against daily flood time (hr); data are 0=54; 2=59; 4=62; 6=59; 8=54. Panel C plots crab burrow count against daily flood time (hr); data are 0=67; 2=72; 4=75; 6=72; 8=67. Which conclusion is valid for the same x-values in the figure?