This is the 15520th most frequent Russian word.
преобладает
"Prevails" or "dominates."
'Преобладает' here is used to describe what is most common or prevailing in a specific setting, in this case, the climate.
В этом регионе преобладает теплый климат.
In this region, a warm climate predominates.
'Преобладает' expresses influence or dominance over other opinions in a decision-making process.
Мнение большинства преобладает в коллективных решениях.
The opinion of the majority predominates in collective decisions.
'Преобладают' (plural form) is used to indicate the main or most noticeable characteristic, here being the bright colors in the artwork.