You overheard a conversation between X and Y in a building. The conversations were as follows:
\begin{quote}
X: I am a part of a window and can be appreciated from outside.
Y: Well, I might be invisible, but I carry the building load.
X: While I ensure light inside the room, I am not affected by the weather.
Y: I am not exposed to the weather, and people take advantage of my strength, which you don’t have much.
\end{quote}
Identify X and Y from the options given below.