Questions & Answers about Spust je klizav zbog blata.
Spust is in the nominative singular because it is the subject of the sentence—the thing being described.
- spust = the slope / the descent
- je klizav = is slippery
So the structure is basically:
- [subject] + [to be] + [adjective] + [reason phrase]
Because klizav agrees with spust.
Since spust is:
- masculine
- singular
- nominative
the adjective also has to be:
- masculine
- singular
- nominative
That is why you get klizav.
Compare:
- — the slope is slippery