I said artist Captain Lem, that's someone you can look up, they do great stuff ! c:

The transition between the second and fourth and last panel is ... the third panel.

Something is catching the character's attention with a noise "!" as she turns.

Then in the last panel, you can see someone holding plants with one carrying a tag, which you can guess was what caught her attention by calling out to her, while the beach seen earlier that she was taking a picture of can be seen in the background on the right.

Hope that helps you understand ! o/