Final answer:
Amphidromic points in wide basins and nodal lines in narrow basins are both related to tidal patterns.
Step-by-step explanation:
Amphidromic points in wide basins and nodal lines in narrow basins are both related to tidal patterns. Amphidromic points are the points in a basin where the tidal wave rotates around, without any vertical movement. Nodal lines, on the other hand, are the lines of zero tidal range. They represent the points where high tide and low tide occur at the same time, resulting in an absence of vertical movement. In both cases, they are influenced by the shape and size of the basin, as well as the interaction of tidal forces.