профессий

профессий

"Professions" or "occupations."

In this sentence, "профессий" is in the genitive plural case, used to indicate possession or a relation (list of professions).

Список профессий в современном мире стал намного шире.

The list of professions in the modern world has become much broader.

Here, "профессий" again is in the genitive plural case, showing description or subject (book about professions).

У меня есть книга, описывающая разные профессии.

I have a book describing various professions.

Finally, "профессий" in this context is genitive plural as well, used to express qualities or attributes (characteristics of professions).

Особенности определённых профессий часто требуют уникальных навыков.

The features of certain professions often require unique skills.