Marram grass (Ammophila arenaria) is a specialized pioneer species that thrives on coastal sand dunes, an environment characterized by strong, salt-laden winds, highly permeable sandy soils, and intense solar radiation.
Figure 1 shows a simplified cross-section diagram of a rolled marram grass leaf.
Explain how the structural adaptations of the marram grass leaf shown in Figure 1 allow the plant to survive in these challenging coastal conditions.