This is the 5480th most frequent Russian word.
подверженных
"Подверженных" means "subject to" or "susceptible to."
Here, 'подверженные' is used to describe people who are affected by or susceptible to stress.
Люди, подверженные стрессу, часто испытывают проблемы со сном.
People prone to stress often experience sleep problems.
In this sentence, 'подверженные' modifies 'районы' to indicate areas that are vulnerable or exposed to the risk of flooding.
Подверженные риску наводнения районы были эвакуированы заранее.
The areas prone to flooding were evacuated in advance.
Here, 'подверженных' describes people who are affected by or susceptible to the influence of advertising.