In a quaint village flanked by a crystal clear lake, three friends - Aarav, Leilani, and Dimitri - decide to spend a leisurely afternoon wading into the waters. The lake's bed slopes gently downwards from the shore, providing a gradual increase in depth. The sun is high in the sky, casting sharp shadows on the ground but causing no distortion through the water, which remains stunningly transparent.

Aarav, being the adventurous one, walks into the lake until the water reaches just below his knees. He stands still, enjoying the cool caress of the liquid. Leilani, more cautious, steps in only until the water kisses the arch of her feet. Dimitri, on the other hand, wades in deeper than both, with the lake's water coming up to his waist. Each friend has a colorful hat on their head, which stands in high contrast to the surrounding environment.

From the shore, a local named Kiyoshi watches the trio. Kiyoshi has an obstructed view because of a group of tall reeds growing at the edge of the lake, blocking the lower third of his vantage point. He can clearly see the hats of Aarav, Leilani, and Dimitri bobbing and hears their laughter carried by the breeze. However, he cannot see below their waists, even though the water is clear.

On the opposite shore, which is a bit higher in elevation, stands Reverie, an artist who is trying to paint the scene. Her angle allows her to see over the reeds and view the entire group, except for the lower halves of their legs because this part is obscured by the water's thickness and the glare of the sun on the surface.

Based on this setting, determine what Kiyoshi and Reverie are each able to see, what they cannot see, and explain the reasoning behind this visibility difference based on their positioning and the environmental circumstances described. Respond briefly.
Kiyoshi, who is standing on the same level as the trio, cannot see the lower parts of their bodies because of the tall reeds, which block his view of anything at and below waist level on Dimitri and below the knees for Aarav. Since Leilani's feet are just in the water, Kiyoshi would be able to see them if not for the reeds. Therefore, Kiyoshi's view is limited to the upper bodies and heads of his friends, with their hats being the most visible feature, as they stand out against the horizontal line of the lake.

Reverie's situation differs due to her higher vantage point and the obvious effects of light and water. She can see over the reeds and observe the trio entirely above the water line, thanks to her elevated position on the opposite shore. However, the sun's glare on water creates a phenomenon known as specular reflection, causing the light to reflect off the surface of the water, which reduces Reverie's ability to see into the water. Despite the water's clarity, the depth and angle at which light penetrates the water influence visibility. Since light does not bend sharply enough to reveal the bottom parts of the friends' legs clearly due to refraction, Reverie perceives a distorted view of the legs that are submerged. This is why she cannot see the lower halves of their legs, which are deeper in the water.

Moreover, as the water gets deeper around Dimitri, the visibility decreases because water absorbs and scatters light, even if it is clear. The deeper the water, the less light reaches to the bottom, which means less light reflects back up, and the objects submerged at greater depths, like Dimitri's lower half, become harder to see clearly, looking rather obscured and shaded.