Question must be answered based on the following excerpt.

Still floating on her back, Alex opened her eyes, disoriented by the quick hit of sun. She righted herself with a glance at the shore: she was farther out than she’d imagined. Much farther. How had that happened? She tried to head back in, toward the beach, but she wasn’t seeming to get anywhere, her strokes eaten up by the water.

Source: Cline, Emma.The Guest. Penguin Books, 2024.

According to Halliday’s Introduction to Functional Grammar (IFG) (1985), the highlighted words above are considered